Linear gradient filters are so-called "linear" because their spectral characteristics are different at different positions and change linearly with the change of spatial position. Linear gradient filters have the advantages of wavelength gradient, channel selection, and stable performance, etc. The spectral characteristics of the filters vary linearly due to the use of ion-assisted or ion-beam sputtering processes, and the formation of wedge-shaped film layers by plating a multilayered film system with varying thicknesses on the substrate surface. ...

Cutoff Range: The cutoff range is the wavelength interval used to indicate the region of the energy spectrum that is attenuated through the filter. The degree of blocking is usually specified in the optical density. Cutoff Range Description Chart Optical Density (OD): OD is an abbreviation for optical density, the portion of light that passes through a sample when...

Optical Filters: Filters are optical devices used to select the desired band of radiation. Filters can selectively transmit a portion of the spectrum while rejecting the rest. Optical filters are commonly used in microscopy, spectroscopy, chemical analysis and machine vision. Transmittance (T):Assuming that the initial value of light is 100%, there will be some loss after passing through the filter, and only 80% of the initial value is obtained by post-testing, then the...

Fluorescent filters generally contain a combination of three pieces, namely, an excitation filter, an emission filter, and a dichroic mirror. Excitation Filter (Exciting Filter, Exciter Filter,Excitation Filter ): In fluorescence microscopy, only the wavelength of the excitation fluorescence can pass through the filter. In the past, short-wavelength filters were used, and now the base...

Image Surface Size CCTV cameras are available with a variety of different sensor size specifications, and the screen aspect ratio is usually 4:3 (horizontal width: vertical height). The sensor size specification has an effect on the field of view, using the same lens on a smaller sensor has a narrower field of view. The specification of the lens has nothing to do with the field of view, it is simply needed to make the image cover the entire sensor, i.e. a camera of the same size or larger specification...

Filtering is a necessary part of optics in imaging, recognition, etc., such as: 1, infrared cutoff filters : allow visible light through, cutoff or reflect infrared light optical filters, products used in cell phones, cameras, car, PC, tablet PC, security monitoring and other imaging cameras. 2, low-pass filter: to filter out high-frequency light waves caused by Moore's stripes, color correction, etc., the products are used in digital camera...