optical filters-sfyh.com

Machine Vision Bandpass Filters

A band pass filter is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range, and it’s used to selectively transmit a portion of the spectrum while rejecting all other wavelengths.

Longpass Filters for Vision inspection Apllication

Long wavepass filters are ideal for a variety of applications, such as gas monitoring, temperature, sensing, thermal imaging and motion sensing etc. Long wavepass filters block shorter wavelengths and transmit longer wavelengths. Blocking can be from reflectance, absorption or a combination. Transmission in the pass band can be enhanced with an antireflection coating on the second surface.

Optical glass neutral density filters

A Neutral Density filter allows a photographer to control the exposure in an image very easily. The filter stops light reaching the camera sensor, therefore allowing us to leave the camera with a higher aperture for a longer amount of time.