Optical Fingerprint Prism for Four Fingers Scanner
Specifications
This finerprint prism mainly used in capturing system and input system of the fingerprint device,Specfication:
| Material | Optical glass,Fused silica, etc |
| Dimension Tolerance | ±0.02mm |
| Angular Accuracy | ±3' |
| Surface Quality | 40/20 |
| Surface Accuracy | λ/5 |
| Clear aperture | >90 |
| Coating | Reflective Coating,AR Coating |
1. Products:This prism mainly used in capturing system and input system of the fingerprint device, now it is the most widely used prism in fingerprint device.
2,Principle:After the LED light going through the uniform frosting surface of the prism, it became a kind of uniform light, when one's finger touch the interface of the capturing system, the fingerprint data will enter into the system through the light path, then the capturing work finished.
3. Advantage:This kind of prism belongs to low-end fingerprint device, which with a bit simple light path, So, the whole capturing system cost is relatively low.
Production line:
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