Surface Figure
Surface form tested by interferometry — PV/RMS values from the actual measurement.
Standard Size · Made to Print
2.70 x 22.20 mm Rod Lens — Standard Size, Made to Print
This 22.20 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 sits at a mid-range relay step: 22.20 mm between relay centers with a 2.70 mm diameter.
✓ ISO 9001:2015
✓ NDA Protected
✓ COA per Batch
✓ MOQ 10+
✓ Quote in 24h
Quick Answer: Φ2.70 × 22.20 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 × 22.20 mm Sits in the Range
Φ2.70 × 22.20 mm combines a 2.70 mm diameter with a 22.20 mm relay pitch, a mid-range step for rigid endoscope relay trains.
This mid-step pairing is often chosen when the relay count must stay moderate without increasing tube diameter.
Design Notes
What to Confirm for Φ2.70 × 22.20 mm
Design note: 22.20 mm is a mid-range pitch; the drawing should confirm whether the relay is a single or double cemented build.
Two Supply Paths
How We Supply Φ2.70 × 22.20 mm
For Coating Laboratories
As a blank, Φ2.70 × 22.20 mm is supplied uncoated with the diameter held for coating-lab loading and batch COA.
For OEM Assemblers
As a finished rod, it is made to your drawing with centration ≤3′ and measured batch values.
Real Production Photos
Φ2.70 × 22.20 mm in Our Production
Photos are production references; final dimensions follow your drawing.
2.70 diameter reference
22.20 length reference
Proven Size
Why Φ2.70 × 22.20 mm Is a Standard
This size is proven in production as a balanced mid-step relay: short enough for compact trains, long enough to reduce relay count.
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 × 22.20 mm
For Φ2.70 × 22.20 mm, you can request the batch COA and inspection photos before placing an order.
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 × 22.20 mm — The Numbers Go on Your COA
The Φ2.70 × 22.20 mm batch COA includes measured diameter, length and centration values.
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 from the Φ2.70 × 22.20 mm process — PV 0.346λ.
Real measurement, kept on file. Your COA gets the same kind of data.
FAQ
Common Questions for Φ2.70 × 22.20 mm
Is Φ2.70 × 22.20 mm a standard production size?
Yes, it is in the database and made to order with MOQ 10+.
What makes the 22.20 mm pitch different from 22.90 mm?
It is a slightly shorter step, used where relay spacing is tighter.
Can you supply it as a blank?
Yes, uncoated with material certificate and batch COA.
What centration do you hold?
≤3′, tighter per drawing.
What documentation is included?
Batch COA with measured diameter, length and centration.
Related
Related Sizes for Φ2.70 × 22.20 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 × 22.20 mm
Watch Φ2.70 × 22.20 mm blanks and finished rods through the same production and measurement flow.
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