Surface Figure
Surface form tested by interferometry — PV/RMS values from the actual measurement.
Standard Size · Made to Print
2.70 x 22.90 mm Rod Lens — Standard Size, Made to Print
This 22.90 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 keeps the widely used 22.90 mm relay pitch at a slimmer 2.70 mm diameter.
✓ ISO 9001:2015
✓ NDA Protected
✓ COA per Batch
✓ MOQ 10+
✓ Quote in 24h
Quick Answer: Φ2.70 × 22.90 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 Φ2.70 × 22.90 mm Sits in the Range
Φ2.70 × 22.90 mm combines a 2.70 mm diameter with a 22.90 mm relay pitch, balancing tube space and relay count.
This pairing is common in builds that want a standard relay pitch with more clearance around the rod.
Design Notes
What to Confirm for Φ2.70 × 22.90 mm
Design note: Φ2.70 × 22.90 mm balances wall clearance and relay count; confirm the datum and edge treatment on your drawing.
Two Supply Paths
How We Supply Φ2.70 × 22.90 mm
For Coating Laboratories
Φ2.70 × 22.90 mm blanks are supplied uncoated with the diameter held for coating labs.
For OEM Assemblers
Finished rods are made to drawing, with centration measured and reported on the batch COA.
Real Production Photos
Φ2.70 × 22.90 mm in Our Production
Photos are production references; final dimensions follow your drawing.
2.70 diameter reference
22.90 length reference
Proven Size
Why Φ2.70 × 22.90 mm Is a Standard
Using 2.70 mm at the common 22.90 mm pitch gives builders more tube wall while keeping a standard relay step.
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 Φ2.70 × 22.90 mm
You can check Φ2.70 × 22.90 mm by requesting the batch COA; the numbers are measured 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
Φ2.70 × 22.90 mm — The Numbers Go on Your COA
Φ2.70 × 22.90 mm ships with a COA containing measured diameter, length and centration.
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 Φ2.70 × 22.90 mm process — PV 0.424λ.
Real measurement, kept on file. Your COA gets the same kind of data.
FAQ
Common Questions for Φ2.70 × 22.90 mm
Is Φ2.70 × 22.90 mm a standard size?
Yes, it is in the 245-size database.
What is the advantage of 2.70 mm diameter?
More wall clearance in a slim tube while keeping a standard pitch.
Can you supply it uncoated?
Yes, as a blank for coating laboratories.
What is the MOQ?
10 pieces, with batch COA included.
How fast is a quote?
Within 24 hours of drawing confirmation.
Related
Related Sizes for Φ2.70 × 22.90 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 Φ2.70 × 22.90 mm
See Φ2.70 × 22.90 mm production live, including polishing and centration checks.
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