Criminal investigation fingerprint detectionReturn >>
1. Application background
A fingerprint is like a person's ID card, which is a unique feature in human beings. It plays a very important role in the detection of crimes and has the characteristics of simple detection, convenience, high efficiency and high accuracy.
2. Application introduction
Ordinary camera fingerprints often have background patterns and potential sweat fingerprints, which are invisible or faintly visible to the unaided eyes and cannot achieve ideal and satisfactory results under visible light. Indigo uses the S-UV camera system to observe and photograph a rough wall surface, a desktop, a credit card surface, and glass sheet with fingerprints under ultraviolet light of 254 nm in the laboratory, and obtains fingerprints with clear outlines and crossing lines.
3. Application advantages
1) Uses the most advanced thinned back-illuminated 2-inch scientific CMOS chip.
2) High quantum efficiency (85%@284nm) in the ultraviolet region 200-400nm.
3) Optimum signal to noise ratio.
4) Uses a high sensitivity, high frame rate, removable scanning detector
A finger print image on the surface of the optically opaque object (exposure time 8 ms) was taken with a 254 nm filter, S-UV UV camera and a 254 nm UV lamp (power 3 W).
Portable UV-VIS-NIR imaging and Processing System
Back - light thinning sCMOS chip technology 180-1100nm high sensitivity, low noise, ultra-wide spectral response @ 254 nm, 60% and 55% @ 365 nm Uv - enhanced, 3-5 m long - distance search function 1.3e- ultra-low readout noise 93dB ultra high dynamic rang