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ND ND YAG LASER ROD ND YAG sapphire Laser

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1940nm Bandpass Filter

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Description

1940nm Bandpass Filter

Feature
Hard plating, long service life;
Accurate wavelength positioning;
Ion evaporation, small temperature drift;
High penetration rate;

The 1940nm Bandpass filter is widely used in medical equipment, remote sensing data, lidar, mid-infrared pump, and other application fields. The typical working wavelength of the continuous fiber laser can also be selected: 1908nm band-pass filter, 1940nm band-pass filter, 1950 nm band-pass filter, 2004nm band-pass filter, 2050nm band-pass filter, etc

Material of 1940nm bandpass filter: optical grade glass (k9.bk7.b270.d263tjgs1. Color glass, float glass, etc.)

Parameter for 1940nm Bandpass Filter

Center wavelength:	1940+/-5nm
Incident angle:	0°
Half peak bandwidth:	40nm
Peak transmittance:	>90% (according to customer demand)
Product size:	3mm-80mm (customizable)
Cutoff wavelength:	200nm-2000nm (according to customer requirements)
Cut off depth:	>OD3-0D6 UV-NIR

Bandpass filter
The filters adjacent to the cut-off region on both sides of the transmission band of the transmittance wavelength curve are called band-pass filters. Bandpass filters can be roughly divided into broadband filters and narrowband filters, and there is no definite boundary between these two types of filters

Optical characteristics of bandpass filter:
The higher the cutoff OD value, the narrower the pass bandwidth will be. At the same time, the higher the reflectivity of the cutoff film, the greater the absorption and scattering, so the peak transmittance of the band-pass filter will also become lower. In the all-dielectric band-pass filter, if the film transmittance of the two surfaces is not equal, it will also affect the reduction of the passband transmittance of the filter.

Application fields of bandpass filter:
Fluorescence analyzer, enzyme marker, cable TV upgrade equipment, wireless transmission equipment, mobile phone bar code scanning, infrared electronic whiteboard, infrared camera, infrared touch screen, iris recognition, infrared medical instrument, infrared ink recognition, red film recognition, and face recognition sensor system. Hand-held infrared laser rangefinder, laser rangefinder, optical instruments, medical and health equipment, and testing instruments.

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