Pingzhi Optics Medical Instrument Infrared 940 Narrow Band Face Recognition High Transmittance and High Cut-off Filter
I. Advantages of 940nm narrow-band optical filters:
1) Suitable for working under strong light (sunlight) interference
2) The transmittance is as high as 90%. The light attenuation coefficient of the instrument is small, which effectively increases the working distance and light intensity, and compensates for the instability of the LED940 infrared lamp.
3) The actual cut-off rate is high. There is no penetration phenomenon under strong infrared light when incident vertically, and the OD is greater than 5.
4) The half-bandwidth is 40 - 50nm. It has a single-sided all-dielectric hard film with dual-function effects. After gluing a sleeve on the back, it can become an ultra-narrow-band biochemical fluorescence microscopic filter, and the OD value can be increased to 8.
II. Actual photos:
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