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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...

Fluorescence, Chinese word. Also known as "fluorescence", refers to a photoluminescent cold luminescence phenomenon. When a room-temperature material by a certain wavelength of incident light (usually ultraviolet or X-rays) irradiation, absorption of light energy into the excited state, and immediately back to the excitation and emit a longer wavelength than the incident light emitted light (usually wavelengths in the visible wavelength band); a lot of fluorescent substances, once the incident light ceased to be emitted, and the phenomenon of luminescence also disappears immediately. With...

1. Wear finger cots when using optical lenses, if there are acids, salts and other substances on your hands that tend to corrode the surface of the glass, don't touch the optical lens directly with your hands, which will lead to imprints on the optical lens, and if you don't wipe off the imprints over a long period of time, it may become a permanent mottling and affect the quality of the imaging of the optical elements. 2. When using optical lenses, hold and put them gently, many optical lenses are glass products, easy to cause bruising, chipping...

Introduction to Enzyme Labeling Instruments Enzyme labeling instrument, that is, enzyme immunoassay detector, is a special instrument for enzyme-linked immunosorbent assay. In fact, it is a disguised special photoelectric colorimeter or spectrophotometer, whose basic working principle and main structure are basically the same as that of the photoelectric colorimeter. It can be simply divided into semi-automatic and fully automatic 2 categories, but its working principle is basically the same, the core is a colorimeter, that is, the colorimetric method to analyze...

Fluorescence microscope is a kind of optical microscope, generally the object to be observed is transparent, or the internal structure can not be well differentiated from the color, then the fluorescence microscope is a good choice to solve the ordinary microscope can not observe the problem of transparent substances. The principle of fluorescence microscope is to use short wavelength light to irradiate the examined object stained with fluorescein, so that it will be excited to produce long wavelength fluorescence, thus...

光学镀膜是指在光学零件表面上镀上一层(或多层)金属(或介质)薄膜的工艺过程。在光学零件表面镀膜的目的是为了达到减少或增加光的反射、分束、分色、滤光、偏振等要求。常用的镀膜法有真空镀膜(物理镀膜的一种)和化学镀膜。用物理或化学的方法在材料表面镀上一层透明的电解质膜，或镀一...