Integrating spherical optical system of automatic fecal occult blood analyzer

An integrating sphere and optical system technology, applied in the field of optical systems, can solve problems such as analysis errors of fecal occult blood, influence of light source detection, test results affected by chromaticity, etc., to achieve strong practicability and improve sensitivity

Active Publication Date: 2012-03-21
DIRUI MEDICAL TECH CO LTD
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Problems solved by technology

[0009] In the existing technology, transmission detection and scattering detection are tested with a single optical path, and the fluctuation of the light source will affect the detection
At the same time, because the coagulation particles have different light absorbances for different wavelengths, the test results are affected by the chromaticity, which brings errors to the analysis of fecal occult blood.

Method used

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  • Integrating spherical optical system of automatic fecal occult blood analyzer
  • Integrating spherical optical system of automatic fecal occult blood analyzer
  • Integrating spherical optical system of automatic fecal occult blood analyzer

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Embodiment Construction

[0045] Such as image 3 As shown, the present invention includes an illumination unit 1 , a sample unit 2 , a signal acquisition unit 3 , and a signal processing unit 4 connected in sequence.

[0046] The lighting unit 1 includes a light source 11 and a beam shaping module 12. The light source is an iodine-tungsten lamp with a color temperature between 2200K and 3000K. The preferred color temperature of the present invention is an iodine-tungsten lamp with a color temperature of 2700K. The power of the light source 11 in the present invention is 9W;

[0047] A beam shaping module, which converts the light emitted by the light source into a quasi-parallel beam for irradiating the sample to be measured;

[0048] The light source is coaxial with the subsequent beam shaping module.

[0049] The beam shaping module includes: a pinhole, placed behind the light source, used to limit the aperture of the light entering the collimator; a collimator assembly, placed behind the pinhole, ...

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Abstract

The invention relates to an integrating spherical optical system of an automatic fecal occult blood analyzer, which belongs to the optical system of the fecal occult blood analyzer, and comprises an illumination unit, a sample unit, a signal collecting unit and a signal processing unit, which are sequentially connected with each other, wherein an integrating sphere is added in the optical system to realize the simultaneous measurement of transmitted light and scattered light, the chromatic absorption problem is solved through a ratio method, and the light intensity fluctuation of a light source is corrected, so the sensitivity can be improved. The integrating spherical optical system can correct the interference of the chroma/or light absorption substances and can compensate the fluctuation of the light intensity, so long-term stable correction can be provided, and the integrating spherical optical system has strong practicability.

Description

technical field [0001] The invention relates to an optical system of a fecal occult blood analyzer. Background technique [0002] Fecal occult blood refers to the bleeding in the digestive tract that is less than 5ml per day, the color change of the stool cannot be seen with the naked eye, and the complete red blood cells cannot be seen in the stool picture microscope, and other methods need to be used to confirm the bleeding. It has been clinically confirmed that 87% of patients with digestive tract cancer have positive fecal occult blood tests. Therefore, fecal occult blood test (FOBT) has important reference value in the diagnosis of gastrointestinal bleeding and screening of gastrointestinal malignancies. [0003] It takes an average of 10 years for the epithelial cells of the digestive tract to develop from abnormal hyperplasia to cancer, which provides sufficient time for early screening and prevention. However, since most of the early stages of intestinal cancer are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01G01N21/59G01N21/51
Inventor 宋洁朱海波张世龙李佳宇
Owner DIRUI MEDICAL TECH CO LTD
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