Multi-port imaging housings
We machine bodies with intersecting optical openings, mounting flanges and internal seats for medical imaging assemblies.
Medical optical housing machining for imaging instruments
Optical Housings and Mechanical Components
Camera and sensor enclosures
Rectangular cavities accommodate sensor boards, with mounting bosses and connector openings positioned around the assembly.
Lens barrels
Turned tubular bodies carry lens seats, retaining-ring threads and external mounting features. Milled flats or side holes can be added to the same component.
Angled optical heads
We machine oblique openings and intersecting faces for housings whose optical and mounting axes run in different directions.
Illumination housings
Machined bodies locate an illumination module around its aperture, cable entry and attachment faces.
Covers and mounting plates
Removable plates close the housing or attach the imaging assembly to its instrument frame.
Lens retaining rings
Threaded rings and spacers locate optical elements within the barrel. Spanner features allow access during assembly.
Polymer housings and carriers
We machine insulating carriers and protective housings in the specified polymer, with openings for the installed instrument components.
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8 parts shown
Materials for Housing Bodies and Inserts
Aluminum housing bodies
Aluminum keeps housing mass down while carrying several machined interfaces. Thin walls around a lens seat need support during pocket milling so clamping does not distort the finished interface.
Metal rings and inserts
A housing body and its small threaded details need not use the same metal. A separate brass or stainless-steel insert can provide a replaceable interface without replacing the complete body.
Engineering polymer components
POM and PEEK are options for insulating carriers and nonmetallic covers. Use the specified grade for the component’s electrical, cleaning and exposure requirements; a material family name does not identify those properties.
Lens Seats and Mounting Datums
Lens seat and locating bore
The bore locates the lens radially; its shoulder sets the axial seat. Their relationship to the mounting face must be defined. A bore can meet its size tolerance yet be misplaced relative to that face.
Sensor mounting surfaces
The sensor module may seat on several bosses or on a separate plate. Their height and orientation establish how that module sits behind the lens; connector clearance is a separate envelope requirement.
Angled ports and common datums
For a housing with angled optical ports, the angle and position must reference the same assembly datums. Independent dimensions from unrelated outside faces can leave the relationship between ports undefined.
Lens-Mount Reference Dimensions
| Interface | Thread | Flange distance |
|---|---|---|
| C mount | 1″–32 TPI | 17.526 mm |
| CS mount | 1″–32 TPI | 12.526 mm |
| S mount | M12 × 0.5 | No standardized distance |
| TFL mount | M35 × 0.75 | 17.526 mm |
| TFL-II mount | M48 × 0.75 | 17.526 mm |
| SM1 lens tube | 1.035″–40 TPI | Set by the optical assembly |
Flange distance is measured from the mounting shoulder to the image plane, not the overall housing length. These are interface references; the drawing defines thread class, engagement, clear aperture and dimensional tolerances. Sources: Edmund Optics, Lens Mounts; Thorlabs, SM1 Lens Tubes.
Turning, Indexed and Five-Axis Machining
Turned barrels and rings
A cylindrical barrel with coaxial seats and threads starts as a turning problem. Adding a few flats or cross-holes does not make simultaneous five-axis machining necessary.
Indexed machining for angled openings
A 3+2 setup holds the part at a selected angle while the tool cuts. This can bring a port or mounting face into reach while retaining the same clamping arrangement.
Simultaneous five-axis contours
Coordinated rotary motion becomes useful when tool orientation must change along a contoured surface. Deep internal seats still need a reachable tool path; extra axes do not make an enclosed feature accessible. [4]
Surface Finishes and Masked Interfaces
Uncoated locating surfaces
A bare locating seat can be retained while other surfaces receive a finish. The masking boundary must leave the required contact area unobstructed.
Black-anodized aluminum
Black anodizing changes the surface at lens threads, bores and shoulders. Critical dimensions belong in their required finished condition, with any masked surfaces identified.
Stainless-steel components
For stainless details, the drawing can separate the machined surface texture from a specified cleaning or passivation process. Those requirements serve different purposes.
Specialty optical coatings
A housing intended for a separate optical-coating process needs that process’s substrate preparation and access requirements before machining is finalized.
We separate cosmetic exterior surfaces from optical-facing cavities in the finish scope, so the two are not accepted against the same appearance requirement. [5]
Inspection of the Finished Housing
Datum-related dimensions
A housing report should identify the controlled bore, shoulder or mounting feature and its drawing datum. Recording unrelated outside dimensions will not verify the lens-to-sensor relationship.
Thread and seating checks
Thread acceptance and full seating are separate checks. A mating component can engage the thread yet stop on a corner, burr or unfinished shoulder before reaching its intended seat.
Protected optical cavities
Burrs at intersecting openings can remain inside the cavity. The drawing’s edge condition and cleanliness requirement should cover these internal surfaces as well as the visible exterior.
Prototype Approval and Repeat Production
Release the mechanical definition
We quote the housing revision that matches the selected lens and sensor interfaces.
Check the first assembly
The prototype stage is where the customer checks insertion, fastener access and the complete optical assembly. A part that measures correctly can still reveal an assembly-access problem.
Approve the production revision
Once the prototype changes are accepted, the released revision becomes the batch reference. An informal adjustment to a first housing must reach the drawing before the next batch.
Control later module changes
A replacement lens or sensor is a design change if its mechanical interface differs. Repeat orders should identify the approved revision rather than rely on the instrument’s unchanged product name.
Order the housing set together
Where a cover, spacer and body are designed as a set, include their separate part numbers and quantities. This makes the quotation’s assembly scope clear without assuming that every housing needs a new lens or sensor.
Information for an Optical Housing Quote
| File or requirement | Include |
|---|---|
| Housing drawing and CAD | Revision, units and datum controls |
| Mating optical module | Mount specification and installation envelope |
| Surface map | Finish, masked seats and optical-facing surfaces |
| Supply scope | Part numbers, quantities and required reports |
Agree confidentiality requirements before sending restricted instrument or product data.
Medical Optical Housing FAQs
Can a C-mount lens fit a CS-mount housing?
A C-mount lens can be used on a CS-mount camera with a 5 mm extension that restores the mounting distance. The reverse combination does not work with a simple extension: a CS lens on a C-mount camera places the image plane ahead of the sensor. Compatibility rests on the mounting distance that places the image plane on the sensor.
Is ordinary black anodizing sufficient for near-infrared imaging?
Do not select the finish by visible color alone. Reflectance depends on wavelength and viewing angle; a surface that looks dark in visible light can behave differently in near infrared. The optical specification needs performance at the instrument’s operating wavelengths, whether the selected finish is anodizing or a specialty coating.
Should the housing be one piece or have a removable cover?
Use the assembly route to decide. A one-piece body reduces joints, but the lens, sensor and retaining hardware must pass through its openings and remain accessible to assembly tools. A removable cover or split body is useful when an internal component cannot be inserted or secured through the available port.
Can an existing housing be used to specify a replacement?
An existing part helps identify interfaces, and the nominal dimensions, tolerances and wear allowance are then reconciled against the mating lens and sensor. A replacement definition should reconcile the measured housing with its mating lens and sensor, then release those requirements in a drawing. Copying a worn seat can reproduce the clearance that caused the replacement.
Does a dimensional report prove that the imaging assembly will focus correctly?
No. A dimensional report verifies the specified mechanical features. Imaging performance also depends on the optics, sensor position and assembly. Lens installation, alignment and functional optical testing each come with their own acceptance scope.
Can an aluminum and polymer housing use the same fitted lens seat?
The nominal layout may transfer, but the fit needs a new check. The lens and housing can expand by different amounts, and polymers can change dimensions under sustained clamping. The required clearance or retention should be evaluated for the actual material grade, temperature range and clamping arrangement, rather than copied from the metal version.
PROJECT SUPPORT
Discuss Your Optical Housing
Share the housing drawing, mating lens or sensor interface and order quantity. We will review the component scope and machining requirements.
Technical references
Interface references and machining context for this page.
- Edmund Optics — Lens Mounts — C, CS, S, TFL and TFL-II thread interfaces and flange distances.
- Thorlabs — SM1 Lens Tubes and Compatible Cage Plates — SM1 thread designation and lens-tube interfaces.
- Victrex — VICTREX PEEK Properties Guide — Grade-dependent thermal expansion and time-dependent deformation.
- Haas Automation — 5-Axis Machining Simplified — Indexed five-sided work and simultaneous five-axis contouring.
- Marshall et al. — Characterization of the Reflectivity of Various Black Materials — Spectral and angular reflectance of black surfaces, 2014.
