Arrayed LED area light source

A LED surface light source, array-type technology, applied in the field of optical detection, can solve problems such as measurement errors and changes, and achieve the effects of improved detection accuracy, long service life, and good thermal stability

Inactive Publication Date: 2012-11-07
CHANGCHUN MATTEL INSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

From the above analysis, it can be concluded that in the case of non-perpendicular light irradiation, the change in the refractive index of the sample solution will caus

Method used

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Example Embodiment

[0009] In the present invention, an array LED2 is installed on one side of the circuit board 3, the center of the circuit board 3 is a circular hole 9 on the circuit board, the side where the LED2 is installed on the circuit board 3 has a concave reflector 1, and the other side of the circuit board 3 has a front convex lens 4, Between the front convex lens 4 and the back convex lens 6 is a sample cell 5 , behind the back convex lens 6 is a spectroscopic optical system 8 , and a slit 7 is formed on the spectroscopic optical system 8 .

The present invention is described in detail below in conjunction with the accompanying drawings:

The invention includes a parabolic concave reflector, a circuit board array LED, a front convex lens, a sample cell, and a back convex lens.

A plurality of LEDs are combined to form an array LED surface light source.

The array LED surface light source is combined with the double focusing optical system, so that the initial surface light source ...

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Abstract

An arrayed LED area light source belongs to the field of optical detection and is capable of vertically illuminating sample solution. Arrayed LEDs are mounted on one surface of a circuit board, a circular hole is reserved at the center of the circuit board, a concave reflector is mounted on one surface, mounted with the LEDs, of the circuit board, a front convex lens is arranged on the other surface of the circuit board, a sample reservoir is arranged between the front convex lens and a rear convex lens, a light-splitting optical system is arranged behind the rear convex lens, and a slot is reserved on the light-splitting optical system. By above technical scheme, the arrayed LED area light source has the advantages that a plurality of LEDs are utilized as light sources to combine the arrayed LED area light source; is uniform in luminous intensity, good in heat stability and long in service life; and improves detection accuracy of the sample solution when being matched with a double focusing optical system. The arrayed LED area light source can be widely used to a detecting instrument of a light-splitting system.

Description

technical field [0001] The invention belongs to the field of optical detection. Background technique [0002] The technology of sample detection by spectrophotometry is quite mature and widely used. Among them, LED has been quite common as the instrument light source. And multiple LED arrays also appear in this type of testing instrument as the same instrument light source. However, people have also found some shortcomings of the LED array light source in long-term practice. When the LED array combined surface light source is used to directly illuminate the sample cell, the light emitted by each LED may not be irradiated vertically on the incident slit of the spectroscopic system, and most of the light sources enter at a certain angle to the vertical line of the incident slit. slit. [0003] Such as Figure 4 As shown, the solid line in the figure is the light emitted from the LED, passing through the sample solution and entering the incident slit. Let the ray deviate f...

Claims

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Application Information

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IPC IPC(8): F21S8/00F21V13/04G01N21/31F21Y101/02
Inventor 杨红冯旭东刘宏权
Owner CHANGCHUN MATTEL INSTR
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