Surface Figure
Surface form tested by interferometry — PV/RMS values from the actual measurement.
OEM Make-to-Print · Rod Lenses
Precision Glass Rod Blanks — Φ1.19–8.0 mm, per drawing
A rod 0.02 mm off is invisible to the eye but changes the fit at coating or assembly. We measure diameter and length per batch and record values on the 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 per your drawing · BBAR 400–700 nm · surface 40/20 MIL-PRF-13830B / ISO 10110-7 5/40-20 · NDA before drawings are shared.
The Problem
Four things to check when buying precision glass rods
A blank looks simple — a cylinder is easy to get wrong quietly.
1 · Diameter and length have to be real. A rod 0.02 mm off is invisible to the eye but changes the fit at the coating or assembly stage.
How HSD avoids it: diameter and length are measured per batch; the values go on the COA.
2 · Surface quality carries through. A dig or scratch on a blank survives polishing and shows up in the finished part.
How HSD avoids it: surface is checked to 40/20 MIL-PRF-13830B / ISO 10110-7 5/40-20 before shipment.
3 · Glass grade matters. The grade defines the optical properties — and it has to match the drawing, batch after batch.
How HSD avoids it: material certificates ship with each batch, and we never substitute a grade without written approval.
4 · Consistency between batches is the quiet killer. Rods from different lots can differ more than rods within one lot.
How HSD avoids it: every batch COA carries measured values, so drift is visible before it reaches your line.
A blank is a promise about the finished rod — we keep the measurement on paper.
Rod Lens Photos
Real rod lenses from our shop floor
Production photos of long precision glass rods, labeled by length. Final specifications per your drawing.
29 mm
15.01 mm
Scope of supply: precision glass rod blanks · laser rod blanks · rod lens blanks for coating labs — uncoated, made to your drawing.
We are make-to-print: you send the drawing, we make the rod lenses. We don't commit to specifications without a drawing. If we can't do it, we'll say so in the reply.
Specifications
Specifications — per drawing, with site-wide standards
| Item | Specification |
|---|---|
| Rod lens diameter range | Φ1.19–8.0 mm; lengths up to 46 mm (per drawing) |
| 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
Centration is measured per ISO 10110-6 (≤3′, tighter per drawing) and the measured value goes on the COA — not a "within spec" line. Photo: our inspection bench.
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 and uncoated blanks.
Are these uncoated blanks?
Yes — precision glass rods ship uncoated, ready for your coating line. Coating can be discussed per project.
What lengths can you make?
Typical lengths up to 46 mm; longer configurations reviewed engineer-to-engineer against your drawing.
What glass grades do you work with?
Per your drawing — JGS1, H-ZF, H-LAK, H-K9L, N-SK15 and similar; material certificates ship with each batch.
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 precision glass rod drawing? Make-to-print, quote within 24 hours.
You send the drawing, we make the rod lenses — NDA protected, MOQ 10. If we can't do it, we'll tell you why.
Send Your Drawing →Email [email protected]Application context
Precision glass rod blanks: Φ1.19–8.0 mm, uncoated
This page covers precision glass rod blanks, Φ1.19–8.0 mm, supplied uncoated for coating labs with material certificate.
Check on the drawing: diameter, length, material grade and end condition.
What makes a precision rod blank different from a finished rod?
A blank is uncoated and made for the coating lab; we hold the same diameter tolerance and COA process.
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 record on an uncoated blank — 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