Sensing and Precision Measurement

What do components in this industry have to carry

The components of sensing devices mainly solve two problems: limiting the light intensity entering the detector within the response range, and eliminating interference bands. Scenarios such as smoke detection and spectral detection also require components to have stable performance under temperature and humidity changes, without wavelength drift.

Common components

• Neutral density filter: wide band flat attenuation, protecting the detector
• Narrowband filter: used for laser ranging, flame detection, and optical communication
• Spectrometers and Spectral Ratio Filters: Proportionally Allocate Light Energy
• Polarizers and waveplates: used for polarization related measurement optical paths

Key selection points

It is necessary to clarify: the detection band, the allowed range of light intensity (determining the attenuation level), and the incident angle of the component - neutral density filters are sensitive to the incident angle, and oblique incidence will cause a deviation in the design transmittance.