Surface Figure
Surface form tested by interferometry — PV/RMS values from the actual measurement.
Standard Size · Made to Print
2.78 x 22.95 mm Rod Lens — Standard Size, Made to Print
This 22.95 mm relay step is already in production. Send the drawing and get a fit check, tolerance review and quote within 24 hours. No custom-quote wait. Supplied as uncoated rod lens blanks for coating laboratories, or finished per your drawing for OEM assembly, with a measured batch COA. It works as a near-23 mm relay step at the 2.78 mm diameter, a common spacing in rigid scope trains.
✓ ISO 9001:2015
✓ NDA Protected
✓ COA per Batch
✓ MOQ 10+
✓ Quote in 24h
Quick Answer: Φ2.78 × 22.95 mm is a proven production size, supplied uncoated for coating labs or finished per drawing for OEM assembly. Diameter −0.02/−0.04 mm, centration ≤3′, batch COA with measured values, MOQ 10.
Specifications
Standard Specs — Confirmed Against Your Drawing
Final tolerances, glass grade and build type are confirmed against your drawing at quote.
Size Positioning
Where Φ2.78 × 22.95 mm Sits in the Range
Φ2.78 × 22.95 mm uses a 2.78 mm diameter with a 22.95 mm relay pitch, close to a 23 mm step for standard rigid scope trains.
At this pitch, the rod usually works as a standard relay step with a flat or cemented interface, depending on the drawing.
Design Notes
What to Confirm for Φ2.78 × 22.95 mm
Design note: at 22.95 mm, treat the pitch as a 23 mm step; confirm the edge chamfer and surface specification on your drawing.
Two Supply Paths
How We Supply Φ2.78 × 22.95 mm
For Coating Laboratories
We make Φ2.78 × 22.95 mm as uncoated blanks with the same diameter fit as the rest of the range.
For OEM Assemblers
Finished rods are made to drawing, with centration and surface quality checked per batch.
Real Production Photos
Φ2.78 × 22.95 mm in Our Production
Photos are production references; final dimensions follow your drawing.
2.78 diameter reference
22.95 length reference
Proven Size
Why Φ2.78 × 22.95 mm Is a Standard
At 22.95 mm, the pitch sits just under 23 mm; this pairing has production history and is treated as a proven standard rather than a custom length.
Drawings first. A drawing is always the fastest way to a precise match — send yours and we take it from there.
In-house production
Factory Checks for Φ2.78 × 22.95 mm
You can verify Φ2.78 × 22.95 mm against our COA records; measured values are kept per batch.
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
Quality Evidence
Φ2.78 × 22.95 mm — The Numbers Go on Your COA
Φ2.78 × 22.95 mm batches include measured diameter, length and centration on the COA.
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
Workstation measurement for the Φ2.78 × 22.95 mm process — PV 0.424λ.
Real measurement, kept on file. Your COA gets the same kind of data.
FAQ
Common Questions for Φ2.78 × 22.95 mm
Is Φ2.78 × 22.95 mm a standard size?
Yes, it is in the 245-size database and manufactured to order with MOQ 10+.
Is 22.95 mm treated as a custom length?
No, it is a proven production pitch close to 23 mm.
Can you hold 40/20 surface quality?
Yes, 40/20 per MIL-PRF-13830B (US) and ISO 10110-7 5/40-20 (EU).
Can it be supplied uncoated?
Yes, with material certificate and batch COA.
What is on the COA?
Measured diameter, length and centration for the batch.
Related
Related Sizes for Φ2.78 × 22.95 mm
Standard Rod Lens Sizes
Full 245-size database, by family.
Rod Lenses — Product Range
Relay and rear rods, Φ1.19–8.0 mm, per drawing.
Applications
Hysteroscope, cystoscope and slim rigid scope optics.
Factory Video
Tour the Factory for Φ2.78 × 22.95 mm
See Φ2.78 × 22.95 mm production and inspection in the factory video tour.
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