Spectrophotometer optical system and special optical filter picking mechanism for same

Abstract

The invention relates to a spectrophotometer optical system and a special optical filter picking mechanism for the same. The spectrophotometer optical system comprises a front light path (A), a sample cell (1), an optical splitting system (B) and a photoelectric receiver (2), and is characterized in that the front light path (A) comprises a light source (3) on the front end of the sample cell (1), wherein the light of the light source (3) is transmitted onto a first convex lens (4), a first reflection mirror (5) is installed at the side of the first convex lens (4) to be symmetric to the light source (3), the first reflection mirror (5) is arranged on a focal point of the first convex lens (4), the light enters the optical splitting system (B) from the sample cell (1) after being reflected by the first reflection mirror (5) to the sample cell (1), and the light is emitted onto the photoelectric receiver (2) after being analyzed by the optical splitting system (B). According to a spectrophotometer manufactured by the optical system provided by the invention, the size of the spectrophotometer can be reduced, the cost is greatly reduced, and the mass popularization is realized.

Description

Technical field [0001] The invention relates to the technical field of spectroscopic instruments for material component analysis, in particular to an optical system of a spectrophotometer that analyzes material components by comparing the light intensity of a sample to be analyzed and a standard sample, and a special filter pick mechanism. Background technique [0002] It is well known that the visible spectrophotometer can perform qualitative and quantitative analysis of sample materials in the near ultraviolet-visible spectrum region. It is one of the commonly used spectral analysis instruments in physical and chemical laboratories. It uses an advanced blazed grating monochromator and has wavelength accuracy. High, good monochromaticity, low stray light, etc., adopts a microcomputer measurement system, τ-A conversion accuracy is high, and has automatic adjustment of 0% and 100%, concentration factor setting, concentration direct reading, and optional serial The data printer per...

AI Technical Summary

Problems solved by technology

The spectrophotometer made by this front optical path spectroscopic method shines into the sample cell j after the light passes through the grating h, the filter g and the condensing convex lens i, and the sample cell j must be at the focus of the condensing convex lens i, so that The spectrophotometer made by this front optical path spectroscopic method is bulky and complex in structure, and the price is relatively expensive.

[0005] Although Chinese patent CN101629905B discloses an optical path system with a small volume and the sample cell is placed at the front end of the entire spectroscopic system, the spectrophotometer of this patent uses the excitation side optical system to directly transform the light of the light source through the excitation side optical system. Monochromatic light, and then use monochromatic light to measure the sample. This kind of spectrophotometer using the excitation side optical system is very expensive, which is not conducive to cost saving, and is not suitable for mass promotion.

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