Detection head of spectrophotometer

Abstract

The invention discloses a detection head of a spectrophotometer, relating to the spectrophotometer. The detection head of the spectrophotometer has small volume and high sensitivity, can be separated with an instruement host and is played once plugged, is portable; and with the adoption of the detection head of the spectrophotometer, the interference of stray lights is reduced, the immediate detection requirements in field and site are satisfied, and the detection stability can be greatly enhanced. The detection head of the spectrophotometer comprises a shell, an incidence optical fiber, a reference optical fiber, an incidence optical fiber collimator, a light splitting part, an optical reflection part, a return optical fiber collimator, a return optical fiber and a sample chamber. Because an optical fiber type probe is adopted, the anti-interference performance is enhanced with optical fiber transmission. Because a conical reflecting prism is adopted, an integrated multi-optical-pathabsorption optical detection head which has compact structure can be obtained, and therefore, under the condition without increasing the length of a sample chamber, an absorption optical path is enlarged, the interference of stray lights is reduced, the sensitivity is enhanced, and the optical regulation difficulty is also lowered; while, spectrophotometers at home and aboard are all in a single absorption optical path optical detection head. Because a reference optical path is arranged, the detection stability can be greatly enhanced.

Description

technical field [0001] The invention relates to a spectrophotometer, in particular to a spectrophotometer detection head. Background technique [0002] As an optical analytical measuring instrument, a spectrophotometer is widely used in various fields. Since the existing spectrophotometer adopts sample mechanisms such as cuvettes and cuvettes, there are problems such as complicated operation, many interferences, large volume, low sensitivity, complex structure, and not easy to carry. With the development of science and technology, the demand for high-end spectrophotometers is increasing year by year, especially for field and on-site real-time detection, and the demand for high-precision analysis of samples is becoming more and more urgent. The plug-and-play detection head suitable for small instruments that eliminates stray light and improves the noise index is a development trend and the focus of research at home and abroad. [0003] Chinese patent 2008100706512 discloses...

AI Technical Summary

Problems solved by technology

There are one output fiber bundle and one return fiber bundle in the special-shaped optical fiber transmission beam, and two reference fiber bundles. Up to four fibers are needed in total. The measuring probe is placed in a stainless steel tube with a length of 200mm, which largely gives the measurement zone Inconvenience

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