NMX‑EOM‑30 / Rev 00 / optomechanics / mount · mechanism · boresight 2026 · Product Page

NMX-EOM-30 · ENGINEERED TO ORDER — EO/IR PAYLOAD MOUNTS, MECHANISMS & BORESIGHT EQUIPMENT

The sensor sees. The mount decides where.

Name: EO/IR Payload Mounts, Retraction Mechanisms & Boresight Equipment
Brand: Neometrix

A payload’s own stabilisation holds its line of sight steady. The mount decides where that line starts — and a mount that shifts by a fraction of a milliradian has spent the sensor’s accuracy before it is switched on. So it is designed against a share of the pointing error budget, not drawn as a bracket: machined datum schemes, kinematic location so refit repeats, matched thermal growth, and stiffness placed so no resonance sits inside the stabilisation loop’s bandwidth. Around it: retraction and mast mechanisms that deploy, stow, lock and — the requirement that actually governs — return to the same place every time; gimbal mechanics; and the theodolites, collimators and fixtures that turn an alignment into a certificate. This is deliberately not the sensor: detectors, optics and stabilisation electronics stay with the payload supplier. Delivered against a won order for boresight and alignment equipment.

Enquire — mounts & boresight equipment Capability sheet (PDF)

Illustrative image, not a delivered system — a precision machined payload mount assembly on a black granite surface plate in a metrology room: a stout anodised aluminium yoke with two large bearing housings cradling a plain featureless matt-grey sphere with no openings, bolted to a machined base plate showing ground datum pads and polished dowel bushes, a sealed cable gland at the rear, pale grey walls, no people and no text

Fig · 01 The mount — datum pads, dowel bushes and bearing housings: everything that decides whether the sensor’s precision survives installation — illustrative, not a delivered system

Holds

the datumstiffness · thermal match

Deploys

& returnsrepeatable refit

Aligns

to a certificatetheodolite · collimator

Qualified

mass-dummy fittedvibration · shock · salt

Not

the sensoroptics stay with its supplier

ISO 9001 / 14001 Delivered boresight equipment Payload-agnostic Metrology-backed alignment Noida · India

Overview

The mount is the accuracy.

Sensor payloads are bought on their specifications and judged on their installed performance, and the gap between the two is almost always mechanical. The payload controls jitter about its own axes; nothing inside it knows where those axes actually are relative to the platform. That is the mount’s job, and it is a measurement problem disguised as a bracket — which is why it deserves an error budget, machined datums and a certificate, like any other instrument.

Illustrative image, not a delivered system — optical alignment equipment on a heavy workshop bench: a precision surveying theodolite on a sturdy tripod facing a long tubular collimator on an adjustable stand about two metres away, with a straight machined metal bar on vee-blocks and a small digital inclinometer with a blank display laid on the bench between them, matt black and bare-metal finishes, no people and no text

Fig · 02 The alignment set — theodolite, collimator, calibrated bar and inclinometer: what turns “aligned” into a number — illustrative, not a delivered system

An error budget, not a bracket. The mount is allocated a share of the total pointing error and then engineered to hold it. Its interfaces sit on a common datum scheme rather than on whatever face was convenient. Location is kinematic or semi-kinematic, so a payload removed and refitted lands in the same place instead of a nearby one. Materials are chosen for differential thermal growth, because an assembly aligned in a workshop and used across a wide temperature range will move if aluminium is bolted to steel without thought. And stiffness is placed deliberately: a compliant mount does not simply sag, it puts a resonance inside the stabilisation loop’s bandwidth, after which the structure and the control loop spend their time arguing.

Deployment is a repeatability problem. Retractable arms, hoistable and telescoping masts and deployable cradles all have the obvious engineering — kinematic path and envelope, drive, positive locking in both deployed and stowed states, sealing when stowed, limit stops, and an emergency stow and manual override for the day the drive fails. The requirement that actually decides whether the system is liked is quieter: does it come back to the same place? A mechanism with loose redeployment repeatability forces a re-alignment after every cycle, and in practice what happens instead is that nobody re-aligns, and a perfectly good sensor acquires a reputation for drifting.

Then you prove it. Alignment is done with instruments and written down: bench alignment before installation, on-platform boresight against the platform’s own reference axes using a theodolite and collimator, a calibrated bar and fitment mechanism where the interface demands one, and a re-verification method the operator can run without a contractor. What leaves is a certificate carrying measured values — not a tick in a box.

This page is deliberately the mechanical and alignment layer. Detectors, optics and stabilisation electronics remain the payload supplier’s — and on most programmes they are export-controlled. What decides whether their precision survives installation is the metalwork.

Delivered

Boresight equipment, on a won order

Inclinometer, theodolite and calibrated bar with a boresight fitment mechanism, supplied against an order received — the alignment franchise is not theoretical.

Repeatable

Refit lands in the same place

Kinematic location and machined datums so a payload can be removed for repair and refitted without losing alignment.

Payload-Agnostic

We hold it; we don’t build it

The mount is engineered to the payload’s mass, inertia, interface and environment — whoever supplies the payload.

Architecture

Hold the datum, then prove it.

The schematic follows the chain — the platform’s axes, the mount that holds a datum against them, the mechanism that deploys and stows without losing it, and the boresight that measures and certifies — and shows the hardware behind each: mount and interfaces, retraction mechanism, gimbal mechanics, and the alignment equipment.

FIG · 03EOM ARCHITECTURE · MOUNT + INTERFACES / RETRACTION MECHANISM / GIMBAL MECHANICS · BORESIGHT EQUIPMENT

Fig · 03 Hold it, deploy it, return it to the same place — and be able to prove all three

Arc · 01

Mount & Interfaces

Machined datum schemes, kinematic location, matched thermal growth — stiffness placed clear of the stabilisation loop’s bandwidth.

Arc · 02

Retraction Mechanism

Path, drive, positive locking both states, stowed sealing, limit stops, manual override — and redeployment that repeats.

Arc · 03

Gimbal Mechanics

Bearing preload, slip rings and cable wraps without torque ripple, balance about all axes, hard stops that protect the payload.

Arc · 04

Boresight Equipment

Theodolite, collimator, inclinometer, calibrated bar and fixtures — bench, on-platform and operator re-verification, on a certificate.

Have a payload to mount, deploy or align? Send the payload’s mass, interface and environment, and the platform’s axes — a clause-by-clause compliance matrix within two working days · [email protected]

Send tender spec

Specifications

Reference scope, built to the payload.

The scope below describes a reference installation. The mount sizing, mechanism type, alignment set and qualification programme all follow from three givens: the payload’s mass, inertia and interface, the platform’s reference axes and environment, and the pointing accuracy the system must hold through life.

Illustrative image, not a delivered system — a retractable deployment mechanism on a steel test stand: a machined telescoping aluminium arm halfway extended with its precision lead screw and two hardened guide rails exposed along the side, a stepped limit stop and a small spring-loaded locking pawl at the joint, a plain grey cylindrical mass dummy bolted to the free end, clamped to a welded steel frame on a concrete floor, no people and no text

Fig · 04 The mechanism, qualified with a mass dummy — never empty, because the empty one always passes — illustrative, not a delivered system

Where payload mounts go wrong

The mount is treated as a bracket and given no share of the pointing error budget, so nobody ever calculates what it contributes until the installed performance disappoints. Refit is not repeatable, so every removal costs a re-alignment — and eventually nobody re-aligns. A resonance lands inside the stabilisation bandwidth and the loop fights the structure. Thermal growth is ignored, so an assembly aligned in a workshop moves in service. Deployment mechanisms are qualified empty and then fitted with a real payload mass, which is a different machine. And alignment is recorded as a tick rather than as measured values, so nobody can tell later whether a system has drifted or was never right.

So the discipline runs the other way. The mount gets an allocated error share and a datum scheme. Location is kinematic, and refit repeatability is a measured acceptance criterion, not an aspiration. Stiffness and modal placement are checked against the payload’s control bandwidth. Materials are selected for matched growth across the service range. Mechanisms are qualified with a representative mass and inertia dummy through vibration, shock, temperature, salt fog and altitude. And every alignment leaves a certificate with numbers on it, from traceable instruments, with a re-verification method the operator can run.

Full specification — expand

Scope	EO/IR payload mounts & interfaces, retraction & mast mechanisms, gimbal mechanics, boresight & alignment equipment, fixtures, qualification & through-life support
Scope Boundary	Not the sensor — detectors, optics, stabilisation electronics & their software remain the payload supplier's; this is the mechanical & alignment layer around them
Mount Design	Allocated share of the pointing error budget; common machined datum scheme; kinematic / semi-kinematic location; matched differential thermal growth; modal placement clear of the stabilisation bandwidth
Refit Repeatability	A measured acceptance criterion — the payload removed & refitted must return within the allocated share, so repair does not cost an alignment
Retraction Mechanisms	Retractable arms, hoistable & telescoping masts, deployable cradles — kinematic path & envelope, drive, positive locking deployed & stowed, stowed sealing, limit stops
Failure Provision	Emergency stow & manual override; hard stops that protect the payload rather than the structure; defined behaviour on drive or power loss
Gimbal Mechanics	Bearing selection & preload, slip rings & cable wraps adding no torque ripple, static & dynamic balance about all axes
Boresight Equipment	Theodolites, collimators, inclinometers, calibrated bars & fitment mechanisms, with the fixtures & jigs that hold payload & reference together
Alignment Method	Bench alignment before installation · on-platform boresight against the platform's own reference axes · operator re-verification without a contractor
The Record	A certificate carrying measured values from traceable instruments, with the procedure & the re-verification method — not a tick
Qualification	Vibration, shock, temperature cycling, salt fog & altitude — always with a representative mass & inertia dummy fitted, never empty
The Family	Beside the optical-system integration, telescopic & hoistable mast and assembly-jig & tooling franchises on this site
Sourcing	Bearings, drives, slip rings, theodolites & reference instruments are bought-in certified items; Neometrix engineers the mounts, mechanisms, fixtures, alignment equipment & qualification
Status	Delivered against a won order for boresight & alignment equipment · quoted across optronic mast, retractable payload-mechanism, optical test-bed & boresight-equipment requirements · no delivered payload mount or retraction mechanism is claimed on this page

PDF · 1 page

EO/IR Payload Mounts & Boresight Equipment — Capability Sheet

Tender Response

Send payload mass, interface & axes — compliance matrix in two working days

Variants

One discipline, four scopes.

Requirements arrive as a mount, a retraction mechanism, an optronic mast, or a set of alignment equipment. The discipline — hold the datum, return to it, prove it — is common; the hardware follows the payload and the platform.

Var · 01

Payload Mounts & Interfaces

Fixed and isolated mounts, adaptor plates and datum schemes — sized to the payload’s mass, inertia and interface, on any platform.

Var · 02

Retraction & Mast Mechanisms

Retractable arms, telescoping and hoistable masts, deployable cradles — with locking, sealing, override and measured redeployment repeatability.

Var · 03

Boresight & Alignment Equipment

Theodolite and collimator sets, inclinometers, calibrated bars, fitment mechanisms and fixtures — the delivered franchise.

Var · 04

Qualification, Refit Support & AMC

Environmental qualification with mass dummies, refit procedures that preserve alignment, spares, re-verification training and AMC.

Applications

Wherever a payload must point true.

Airborne, naval, vehicle-borne and ground installations — and the workshops that align them.

A · 01Airborne payload mounts & retraction

A · 02Naval optronic masts & deck installations

A · 03Vehicle & mobile-platform payloads

A · 04Ground & mast-mounted surveillance installations

A · 05Payload repair & refit workshops

A · 06Metrology & alignment laboratories

FAQ

Common questions.

Plain-language answers from the engineering team.

Q · 01 The payload is stabilised — why does the mount matter at all?

Because stabilisation and alignment are two different problems, and a payload only solves one of them. Internal stabilisation holds the line of sight steady against motion — it rejects platform vibration and manoeuvre so the image does not smear and the pointing does not wander. What it cannot do is tell you where its own axes sit relative to the platform, because it has no independent knowledge of the platform at all. That relationship is established entirely by the mechanical interface, which means the mount defines the datum and the payload defines the steadiness about it. If the mount is compliant, thermally mismatched or not repeatable on refit, the datum moves and every measurement the payload makes inherits the error — invisibly, because the image still looks perfectly steady. There is a second, less obvious coupling: a mount is a structure with modes, and if one of those modes falls inside the stabilisation loop’s control bandwidth, the loop and the structure interact. The system may then perform worse with stabilisation active than without it, which is a genuinely confusing fault to chase in service. So the mount is engineered as part of the pointing chain, not as the thing that stops the payload falling off.

Q · 02 What does “repeatable refit” mean, and why is it the governing requirement?

It means that a payload taken off for maintenance, repair or transport and then refitted returns to the same angular position, within the share of error the mount has been allocated — so the alignment established at installation is still valid afterwards. It governs because of what happens when it is absent. If a refit costs an alignment, then every removal costs a theodolite, a trained person, several hours and an aircraft or vehicle standing still. In real units the outcome is predictable: the re-alignment gets deferred, then skipped, and the fleet quietly operates with payloads whose datums nobody has confirmed for a year. The equipment has not failed any test; it has simply become untrustworthy. The engineering answer is kinematic or semi-kinematic location — constraining exactly the six degrees of freedom, once each, through defined features such as ground pads, dowels or cones and vees, rather than over-constraining the assembly with a bolt pattern and relying on friction to hold whatever position it happened to take up. Add controlled fastener sequence and torque, and the assembly lands in the same place every time. We treat that as a measured acceptance criterion: remove, refit and measure, several times, and record the spread.

Q · 03 How is a boresight actually performed, and what do you hand over?

In three stages, each with instruments. Bench alignment comes first: the payload and its mount are set up against a collimator, which presents a reference at effective infinity so the measurement does not depend on range, and the relationship between the payload’s line of sight and the mount’s machined datums is measured and adjusted. Second, on-platform boresight: with the mount installed, a theodolite is used to relate the mount’s datums to the platform’s own reference axes — the same axes the rest of the installation is rigged to — with an inclinometer establishing the level reference and a calibrated bar or fitment mechanism providing a hard mechanical reference where the interface needs one. Third, a re-verification method: a simplified check the operator can run periodically, without a contractor, to confirm nothing has moved. What we hand over is the equipment, the fixtures, the written procedure and a certificate carrying measured values — angles, offsets, the instruments used and their calibration status. That last point matters more than it sounds: an alignment recorded as a tick tells you nothing later, whereas numbers let you tell the difference between a system that has drifted and one that was never right.

Q · 04 What is involved in a retraction mechanism beyond moving in and out?

The motion is the easy part. The engineering sits in four places. The two end states: deployed and stowed both need positive locking rather than reliance on the drive holding position, because a drive holding load through a long transit is a drive that will eventually be found not holding it. The stowed condition: sealing against water, dust and salt, a protected envelope, and a resting position that does not load the payload through its own delicate interfaces. The deployed condition: the structure now carries aerodynamic or seaway loads and vibration with a mass on the end of a lever, and that is the case the stiffness and fatigue analysis is actually written against. And the failure cases: what the mechanism does on loss of power or drive, whether it can be stowed manually by one person with a hand tool, and where the hard stops are placed so that an overrun damages a cheap sacrificial part rather than the payload. Add to that the repeatability discussed above, and travel limits that protect the cable wrap. Qualification then has to be done with a representative mass and inertia dummy fitted — an empty mechanism passes almost anything, and tells you almost nothing.

Q · 05 Why don’t you build the payload itself?

Because it is a different industry, and pretending otherwise would not serve a customer. A modern electro-optical payload is built from infrared detectors and focal-plane assemblies, precision optics, stabilisation electronics and embedded software — each a specialised supply chain, most of them export-controlled, and several of them dominated by a very small number of manufacturers worldwide. Sourcing and integrating those is a business we are not in, and a page claiming otherwise would waste a buyer’s time. What we are in is the metalwork and the metrology: precision machined structures, mechanisms, bearings and drives, fixtures and jigs, environmental qualification, and alignment equipment — all of it franchises this workshop already runs for masts, mobile-platform optical installations and aerospace tooling. That split is also how these programmes are actually contracted: the payload comes from its supplier, and somebody has to make it fit, deploy, survive and point true on a specific platform, repeatably, with a certificate. That work is unglamorous, it is almost always on the critical path, and it is the part where an installed system is won or lost.

Q · 06 What do you build, what is bought-in, and what has been delivered?

What Neometrix does: the mounts and interfaces — machined structures, adaptor plates, isolation where required, datum schemes and kinematic location features; the retraction and mast mechanisms — kinematics, drives, locking, sealing, limit stops and manual override; the gimbal mechanics — bearing arrangements and preload, slip-ring and cable-wrap installation, balancing; the boresight and alignment equipment — theodolite and collimator sets, inclinometers, calibrated bars, fitment mechanisms, and the fixtures and jigs that hold payload and reference together; the qualification programme with representative mass dummies; and installation, procedures, training, spares and AMC. What is bought-in certified: bearings, drives and actuators, slip rings, theodolites and reference instruments, and calibration services. What has been delivered: an order received for inclinometer, theodolite and calibrated bar with a boresight fitment mechanism — the alignment franchise, supplied and accepted. Beyond that we are quoted across optronic mast, retractable payload-mechanism, optical test-bed and boresight-equipment requirements, and no delivered payload mount or retraction mechanism is claimed on this page.

↗

The optomechanical family from Neometrix.

Where the payloads go, the masts that raise them, and the tooling discipline that aligns them — engineered at our Noida facility.

↗ Integration

Optical System Integration on Mobile Platforms

Where payloads are installed, powered and protected — this page is the mount beneath.

↗ Masts

Telescopic & Hoistable Mast

The deployment franchise — the same locking, sealing and repeatability discipline.

↗ Tooling

Aerospace Assembly Jigs & Form-Block Tooling

The fixture and datum discipline that alignment work is built on.

Browse all Neometrix product lines.

Get a quotation

Send the payload
and the axes.

The defence programmes desk replies within two working days with a clause-by-clause compliance matrix and a budgetary quotation. Write to [email protected] or use the form.

Enquire — mounts & boresight equipment Capability sheet (PDF) +91 7777 876 876

ISO 9001 / 14001 ENGINEERED TO ORDER — EO/IR PAYLOAD MOUNTS, MECHANISMS & BORESIGHT EQUIPMENT ERROR-BUDGETED MOUNTS · REPEATABLE REFIT · DEPLOYMENT MECHANISMS · CERTIFIED ALIGNMENT ENGINEERED IN NOIDA · INDIA

The sensor sees. The mount decides where.

The mount is the accuracy.

Boresight equipment, on a won order

Refit lands in the same place

We hold it; we don’t build it

Hold the datum, then prove it.

Mount & Interfaces

Retraction Mechanism

Gimbal Mechanics

Boresight Equipment

Reference scope, built to the payload.

Where payload mounts go wrong

One discipline, four scopes.

Payload Mounts & Interfaces

Retraction & Mast Mechanisms

Boresight & Alignment Equipment

Qualification, Refit Support & AMC

Wherever a payload must point true.

Common questions.

The optomechanical family from Neometrix.

Optical System Integration on Mobile Platforms

Telescopic & Hoistable Mast

Aerospace Assembly Jigs & Form-Block Tooling

Send the payload
and the axes.

Similar Products

Share This Page

The sensor sees. The mount decides where.

The mount is the accuracy.

Boresight equipment, on a won order

Refit lands in the same place

We hold it; we don’t build it

Hold the datum, then prove it.

Mount & Interfaces

Retraction Mechanism

Gimbal Mechanics

Boresight Equipment

Reference scope, built to the payload.

Where payload mounts go wrong

One discipline, four scopes.

Payload Mounts & Interfaces

Retraction & Mast Mechanisms

Boresight & Alignment Equipment

Qualification, Refit Support & AMC

Wherever a payload must point true.

Common questions.

The optomechanical family from Neometrix.

Optical System Integration on Mobile Platforms

Telescopic & Hoistable Mast

Aerospace Assembly Jigs & Form-Block Tooling

Send the payloadand the axes.

Similar Products

Share This Page

Send the payload
and the axes.