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25MP 35mm Machine Vision Lens 0.02% TV Distortion for Precision Metrology
Product Specification
Place of Origin:
China
Brand Name:
AOTAOJI
Certification:
RoHS Compliant, CE
Model Number:
K3528-25M
Minimum Order Quantity:
10 Pieces
Price:
USD 120-480 / Piece
Payment Terms:
T/T,L/C,Western Union,PayPal
Supply Ability:
8000 Pieces per Month
Product Details
Highlight:
35mm 0.02% TV Distortion
,Manual Iris Precision Metrology
,25MP Measuring Grade Optics
Product Name:
25MP 35mm Precision Metrology Machine Vision Lens
Application:
Precision Metrology And Gauging
Resolution:
25MP
Image Size:
1.1 Inch
Focal Length:
35mm
Aperture Range:
F2.8 To F16
Focus Range:
0.2m To Infinity
Field Of View:
22.91 Deg X 16.87 Deg (1.1 Inch) / 21.53 Deg X 14.44 Deg (1 Inch) / 18.41 Deg X 11.63 Deg (1/1.2 Inch)
TV Distortion:
0.02% At 0.4m
Mount Type:
C-Mount
Filter Size:
M30.5 P=0.5mm
Operating Temperature:
-20C To 70C
Product Description
K3528-25M 35mm 25MP Machine Vision Lens with 0.02% TV Distortion
The K3528-25M is a 35mm fixed focal machine vision lens built for measurement rather than for looking. TV distortion at 0.4m is specified at 0.02%, essentially flat across the field, so edge-to-edge pixel distances scale linearly and a calibration made in the centre stays valid at the corners. Combined with 25MP of resolving power on a 1.1-inch sensor, the lens gives metrology stations the pixel density needed to resolve 5 to 10 micron features at a practical standoff.
The field of view is 22.91 x 16.87 degrees on a 1.1-inch sensor, which fills a 200mm measurement envelope at roughly 0.5m. The iris runs from F2.8 to F16 with a locking screw, letting the operator stop down to F8 for maximum MTF and depth of field, and the focus ring covers 0.2m to infinity. The barrel is machined to tight concentricity so the optical axis stays aligned after remounting, and each 25MP machine vision lens ships with an MTF trace and a distortion certificate.
Technical Specifications
| Model | K3528-25M |
|---|---|
| Focal Length | 35mm |
| Image Size | 1.1 inch |
| Resolution | 25MP |
| Iris Range | F2.8 to F16 |
| Focus Range | 0.2m to Infinity |
| Field of View (H x V) | 22.91 x 16.87 deg (1.1 inch) / 21.53 x 14.44 deg (1 inch) / 18.41 x 11.63 deg (1/1.2 inch) |
| TV Distortion | 0.02% at 0.4m |
| Mount Type | C-Mount |
| Filter Size | M30.5 P=0.5mm |
| Dimensions | 35 x 45.6mm |
| Aperture / Focus Control | Manual with locking screws |
| Operating Temperature | -20C to 70C |
Typical Applications
- Dimensional metrology, gauging and tolerance verification
- CMM-style optical measurement cells and offline measurement benches
- Gear, thread and profile inspection
- Precision assembly verification on machined components
- Medical device and connector dimension checks
- Calibration targets and optical reference standards
Why This 35mm Lens Is Rated for Measurement Work
- 0.02% TV distortion at 0.4m keeps scale linear across the entire 1.1-inch field
- 25MP resolution delivers the pixel density needed for single-digit micron gauging
- F2.8 to F16 iris with a locking screw lets operators stop down for peak MTF stability
- Tight barrel concentricity preserves optical axis alignment after remounting
- Supplied with MTF trace and distortion certificate for measurement system analysis
- RoHS compliant, lead-free build with full batch traceability
Product Questions and Answers
Q: Can I calibrate a measuring machine with this lens directly?
A: Yes. Because TV distortion is 0.02% at 0.4m, a single plane calibration plate covers the whole field. Many customers run a one-time calibration with a certified grid and recheck quarterly, rather than per shift.
Q: What accuracy can I expect at 0.5m working distance?
A: On a 1.1-inch 25MP sensor the 35mm 25MP machine vision lens yields roughly 0.03mm per pixel at 0.5m. Sub-pixel edge detection typically reaches one tenth of that, which puts gauge capability in the few micron range for stable lighting.
Q: Is depth of field sufficient for parts with height variation?
A: At F8 the lens holds a usable depth of field of a few millimetres at 0.4m, enough for stamped and machined parts. For taller parts, stop down further or add a second focus position.
Q: How do you guarantee the distortion specification?
A: Every batch is measured on a collimator-based distortion rig at 0.4m, and the certificate accompanies the shipment. Rejection limits are tighter than the published 0.02% so shipped units stay inside spec over temperature.
Q: Do you offer matched sets for multi-camera measurement cells?
A: Yes. For multi-camera metrology cells we can select and serialise lenses from one coating and assembly lot so all cameras share the same optical signature. Ask our engineers for a matched set quotation.
Supply and Engineering Support
Our team has supplied fixed focal machine vision lens series to metrology houses, machine builders and camera manufacturers across Europe, North America and Asia for over a decade. The K3528-25M exists because measurement customers kept asking for a focal length that keeps 25MP pixel density without a long standoff. Send your measurement envelope, tolerance and sensor format and our engineers will confirm the fit, prepare matched sets or quote volume pricing and private labelling.
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