What is the principle of the blue filter What are the filters

Filters. It is a plastic or glass piece with special dyes added.

The red filter only allows red light to pass through, and so on. The refractive index of the glass sheet.

Originally, it was similar to air, and all colors of light could pass through, so it was transparent, but after dyeing the dye, the molecular structure changes, the refractive index also changes, and the passage of certain colors of light changes. For example, a beam of white light passes through a blue filter, and a beam of blue light is emitted, while there is very little green light and red light, and most of it is absorbed by the filter. Filters do a lot.

Widely used in the photographic world. Why is the main scene always so prominent in the landscape paintings taken by some master photographers, and how do you do it? This is where the filter comes in.

For example, if you want to take a picture of a yellow flower, the background is blue sky and green leaves, if you shoot according to the usual, you can't highlight the theme of "yellow flower", because the image of yellow flower is not prominent enough. However, if you put a yellow filter in front of the lens to block the green light emitted by some green leaves and the blue light emitted by the blue sky, and let the yellow light emitted by the yellow flower pass through in large quantities, then the yellow flower will be very obvious and highlight the theme of "yellow flower".

Microscope filters are fluorescence microscope filters.

The filters of a fluorescence microscope include an excitation filter, an emission filter, and a dichroic mirror, which are the core optical elements of a fluorescence microscope.

Excitation filter: Select the wavelength of the excitation light.

Emission Filters: Transmit fluorescence and block stray light (completely block excitation light) Dichroic mirrors: reflect excitation light, transmit fluorescence.

Color filter under a magnifying glass.

We know that red (R), blue (B) and green (G) are the so-called three primary colors (also known as primary colors), that is, using these three colors, you can mix a variety of different colors, and TVs and monitors use this principle of ridge difference to display colors. Divide the 3 colors of RGB into 3 independent units, so that each has different grayscale changes, and then take the adjacent 3 R, G, and B display units as a basic unit of display - pixels, and this pixel can have different color changes.

In the figure, the black part between each RGB point is called the matrix block (Blackmatrix), the matrix block is mainly used to cover the part that does not intend to transmit light, such as some ITO wiring, or part of the TFT, there is also a part of the matrix block in the upper right corner, this black corner is where the TFT is located.

Color filter, also known as coated color filter, coated filter, it is made by vacuum evaporation, after the light passes through the filter, it can change the color of Yan Shenchen, maintain the high transmittance of a certain rubber ridge band (color), and can withstand high temperature, no shedding, no fading under long-term use, and has the function of blocking far ultraviolet light. Optical characteristics: 30 standard colors can be ** material, thickness and size:

Green board ; Square: 10*10 - 220*220mm; Round: dia3 - 210mm Material and thickness to be customized:

Green board Temperature resistance: Green board: 150 item no:

Dichboro Color Filter KnowledgeIntroduction Color filters account for about 18% of LCD-TV and have little to do with the size of LCD-TV. The color filter is the decisive component that determines the color performance of the LCD display, and also affects the contrast, brightness, and viewing angle of the display. The color filter is the key component of the colorization of liquid crystal display.

The LCD flat panel display is a non-active light-emitting component, and its color display must provide a light source through the internal backlight module (transmissive LCD) or external ambient incident light (reflective or semi-transmissive LCD), and then cooperate with the driver wide Zen IC (Driveic) and liquid crystal control to form a grayscale display, and then provide chromacity through the R, G, and B color layers of the color filter to form a color display screen. In general, color filters for LCD-TV are much more difficult to produce than color filters for computer monitors.

7. Color filter grip light sheet: The light deflected by the liquid crystal defender manuscript Qingzi can only display different gray scales, but cannot provide red, green, blue (RGB) three primary colors, while the color filter Jinghua light sheet is composed of three kinds of RGB filters, and each color and brightness are adjusted through the mixing of the three.

Too much, too much!

Filter products are mainly classified according to spectral bands, spectral characteristics, coating materials, application characteristics, etc.

Spectral band: ultraviolet filter, visible filter, infrared filter;

Spectral characteristics: bandpass filter, cut-off filter, spectroscopic filter, neutral density filter, reflection filter;

Coating materials: soft film filters, hard film filters;

Hard-film filter not only refers to the hardness of the film, but more importantly, its laser damage threshold, so it is widely used in laser systems, and soft-film filters are mainly used in biochemical analyzers.

Bandpass type: Light passes through the selected band, and light outside the passband is cut off. Its optical indicators are mainly center wavelength (CWL) and half-bandwidth (FWHM). It is divided into narrowband and broadband. For example, the narrowband 808 filter NBF-808.

Shortpass type (also known as lowwavelength): Light shorter than the selected wavelength passes through, and light longer than that wavelength cuts off.

For example, the IR-cut filter, IBG-650.

Long-pass type (also known as high-wavelength): light longer than the selected wavelength passes through, and the light cut-off is shorter than that wavelength such as infrared translucent filter, IPG-800.

This is the most booked technology of poor calling, the red and blue filter state Kaiguang imaging technology in stereoscopic films. 3D stereoscopic movies generally use two imaging principles, one is red and blue filter imaging technology, this kind of film needs to be matched with a special red and blue color filter; The other is polarized filter imaging technology, such as IMAX film, which can only see the three-dimensional effect by using polarized light glasses.