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Light-filtering device and its production method

A technology of a filter device and a manufacturing method, applied in the directions of filters, optics, optical components, etc., can solve the problems of slow and straight, unable to obtain a wave passband spectrum, etc., to achieve heat dissipation, good filtering effect, and improved transmission. The effect of the spectrum

Inactive Publication Date: 2006-09-06
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Problems solved by technology

However, when the ripple in the spectrogram of the filter is small, the edge slopes on both sides are relatively gentle and straight; and when the edge slope can be controlled to be steep, the ripples are large; that is, it is impossible to obtain a wave pass band with small ripples and steep edge slopes. spectrogram

Method used

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  • Light-filtering device and its production method
  • Light-filtering device and its production method
  • Light-filtering device and its production method

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0031] Please refer to FIG. 3 , which is a structural schematic diagram of a filter device 200 according to the technical solution of the present invention. The filter device 200 includes a base 210 and a plurality of first filter cavities 220 and a plurality of second filter cavities 230 stacked on it in sequence. The first filter cavities 220 can be stacked sequentially first, and then the second filter cavities 230 can be stacked sequentially on the first filter cavity 220 , or the first filter cavities 220 and the second filter cavities 230 can be stacked alternately.

[0032] The first optical filter cavity 220 is formed on a surface of the substrate 210 and is composed of multi-layer thin films (such as N layers), including alternately stacked high refractive index material film layers 221 and low refractive index material film layers 222 . The multila...

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Abstract

The device comprises a base, and multiple first / second light filter cavities all alternately made with high / low-refractive index material films with optimized height values and overlaid on base in turn. This invention improves transmission spectrogram shape to obtain almost ideal square spectrum, and prevents people from damage while heat dispersion.

Description

【Technical field】 [0001] The invention relates to a filter device, in particular to a filter device capable of filtering ultraviolet and infrared light and allowing visible light to pass through. 【Background technique】 [0002] A filter is a relatively simple spectroscopic device with a wide bandpass. Its function is to filter out unnecessary light and let the required light band pass through. For example, if it is applied to the heat-insulating glass of a car, a filter that can filter ultraviolet or infrared light can be used to eliminate unnecessary light and reduce the energy of sunlight entering the car, thereby reducing the temperature inside the car. The simplest thin-film narrow-band filter is an interference film made according to the Fabry-Perot multi-beam interferometer. Such as figure 1 As shown, its basic structure is two highly reflective quarter-wave film layer stacks 1, with a layer of spacer 2 (Spacer) in between, and the filter formed in this way is a sing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20G02B1/10
CPCG02B5/288
Inventor 陈杰良
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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