Surface Figure
Surface form tested by interferometry — PV/RMS values from the actual measurement.
OEM Make-to-Print · Rod Lenses
Rod Lenses for Hysteroscopes — Φ1.19–8.0 mm, per drawing
A few arc-minutes of centration error on one rod shifts the image at the far end of the train. We measure the full chain per ISO 10110-6 and record values on the batch COA. Send the drawing and get the fit review within 24 hours.
We are a make-to-print manufacturer: you send the drawing, we make the rod lenses — from Φ1.19 mm to Φ8.0 mm.
Glass and coating follow your drawing; standard options are BBAR 400–700 nm and 40/20 surface, with NDA before drawings are shared.
The Problem
What decides whether a 310 mm relay train assembles
Six to ten small rods stacked end to end — if one is off, the whole chain pays for it.
1 · Centration error compounds through the chain. A relay train is a series of Φ1.8 × 23.3 / 40 mm rods. A few arc-minutes of centration error on one rod shifts the image at the far end of the train. The failure shows at final assembly — on your bench, not at the lens supplier's inspection.
How HSD avoids it: centration is verified on a per-batch sampling plan per ISO 10110-6, with measured values on the batch COA.
2 · Diameter and length have to land together. Relay rods seat into tight bores: diameter −0.02/−0.04 mm and length per drawing have to arrive in the same batch. If one drifts, the rod no longer seats and rework starts.
How HSD avoids it: rods are cut and finished from the same drawing package, so diameter, length and centration stay consistent across the set.
3 · The “manufacturer” may be a trader. If your supplier forwards drawings to several shops, nobody can explain a yield problem when it appears — the only fix is paying for a second qualification.
How HSD avoids it: we are the factory — a 30-person precision optical workshop in Nanjing. Your drawing is reviewed by our own engineers.
4 · A bad batch has to be traceable. A COA that only says “within spec” hides drift. Parts pass incoming inspection, the image fails in the assembled scope, and nobody can say which batch did it.
How HSD avoids it: every batch COA carries measured values — dimensions, centration, surface quality, test method.
That is why we treat a relay set as one system: same diameter tolerance, same centration method, same COA format. Assembly doesn't depend on anyone's feel.
Rod Lens Photos
Real rod lenses from our shop floor
Production photos in the diameter range used for hysteroscope optics, labeled by diameter. Final specifications per your drawing.
Φ1.86 mm
Φ1.90 mm
Φ1.96 mm
Φ2.65 mm
Φ2.78 mm
Scope of supply: rod lens relay groups (Φ1.8 × 23.3 / 40 mm) · rear rod lenses (Φ6 class) · eyepiece relay rods (M12.8) · slim relay rods (Φ1.19–1.96) · uncoated rod lens blanks — all make-to-print per your drawing.
Hysteroscope builds combine rods and micro optics. Send the drawing set and we will review both together before production.
Specifications
Hysteroscope component specs — rods and micro optics, one review
| Item | Specification |
|---|---|
| Rod lens diameter range | Φ1.19–8.0 mm (this set: Φ1.8 / Φ6) |
| Diameter tolerance | −0.02 / −0.04 mm (fit) |
| Centration | ≤3′, tighter per drawing |
| Surface quality | 40/20 · MIL-PRF-13830B / ISO 10110-7 5/40-20 |
| Edge chipping | ≤0.05 mm, per drawing · ISO 10110-7 E 0.05 |
| Coating | BBAR 400–700 nm, R<0.5% (per drawing) |
| Glass | Per drawing: JGS1 / H-ZF / H-LAK / H-K9L / N-SK15; material certificates with each batch |
| Length tolerance | Per drawing |
In-house production
Why you can check us
For hysteroscope components, the COA includes measured values for rods and micro lenses, so the whole package is traceable.
ISO 9001:2015 quality system
In-house since 2009 — no reselling
Measured COA per batch
NDA standard before drawings
24-hour engineer quote
MOQ 10 · glass never substituted
FAQ
Common questions
Are you a make-to-print manufacturer?
Yes. You send the drawing, we make the rod lenses — relay rods, rear rod lenses, eyepiece relay rods and uncoated blanks.
What rod lens diameters can you make for hysteroscopes?
Φ1.19–8.0 mm overall; the 310 mm hysteroscope set uses Φ1.8 relay rods and Φ6 class rear rods. Final diameter and length per your drawing.
What centration can you hold?
≤3′ on rod lenses, tighter if the drawing asks for it. The COA carries measured values, not a "within spec" statement.
What's on the COA?
Part number and revision, measured diameter and thickness, measured centration, surface quality and test method. Numbers — not PASS.
What's the MOQ and how fast is a quote?
MOQ 10. Quote within 24 hours of drawing confirmation; samples and production run on the same tolerances and the same process.
Have a hysteroscope rod lens drawing? Make-to-print, quote within 24 hours.
Send the hysteroscope rod and micro lens drawings and engineering will review the package within 24 hours.
Send Your Drawing → Email [email protected]Application context
Hysteroscope optical components: relay rods and micro optics
Hysteroscope builds combine relay rods with micro optics, so this page covers both make-to-print paths: relay rods to drawing and micro lens blanks per your spec.
Check on the drawing: relay rod length, micro lens diameters and the interface between the two; engineering reviews both together.
Can you quote relay rods and micro optics together?
Yes. Send the drawings for both and engineering will review them as one package, with a single COA process per batch.
Inspection & Metrology
We measure it — and the numbers go on your COA.
Every batch is verified with interferometry, centration measurement and surface inspection. You get the actual measured values, not a “within spec” checkbox.
Centration
Centration checked on the centration station, typically ≤3′. The reading shown is from a real part — 2.02′.
Surface Quality
Surface and edge quality inspected under a video microscope — scratch/dig per MIL-PRF-13830B.
What “Pass” Looks Like
A passing surface from a production run: PV 0.51λ, RMS 0.059λ. Rejects never leave the workshop.
Measured COA per batch — ask for a sample COA with your quote. · Learn how to read a surface map →
Real inspection record from this product line
Waviness measurement on a hysteroscope rod — PV 0.346λ.
Real measurement, kept on file. Your COA gets the same kind of data.
See the Factory Live — Schedule a Video Tour
Watch rod lens grinding, polishing, centration measurement and final inspection in real time. All information shared during the tour is confidential — your NDA is welcome.
Schedule a Live Video Tour