Integrating spherical optical system of automatic fecal occult blood analyzer

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 ...

AI Technical Summary

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.

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