Heater for detecting temperature characteristic of optical filter

Abstract

The invention belongs to the field of optical filter heating devices, and particularly relates to a heater for detecting the temperature characteristic of an optical filter. The heater comprises a heat insulation shell (7) and a heat conduction inner core (5); the heat insulation shell (7) is fixedly arranged outside the heat conduction inner core (5); an annular groove (9) is transversely formed in the outer wall of the heat conduction inner core (5); an enameled heating wire (6) is tightly wound in the annular groove (9); a columnar cavity (10) is transversely formed in the middle area of the heat conduction inner core (5); the optical filter (3) is fixedly connected with the bottom edge of the columnar cavity (10) and the blocking piece (2) in a pressing mode; a temperature measuring thermal resistor (1) is fixedly arranged outside the enameled heating wire (6); and light through holes (4) are transversely formed in the middle areas of the heat insulation shell (7), the heat conduction inner core (5) and the separation blade (2). The heater is small in heat loss, convenient to take and place the optical filter, ideal in heating effect, small in size and capable of realizing on-line heating and temperature control and preventing parts in a measuring cavity of the spectrophotometer from being heated.

Description

technical field [0001] The invention belongs to the field of optical filter heating devices, and in particular relates to a heater for detecting the temperature characteristic of an optical filter. Background technique [0002] Optical filters are optical components based on the principle of thin-film interference, and their optical properties depend on the film materials used and the stacking structure of the film layers. The design and manufacture of optical filters are based on the basic constants of the film layer (refractive index n, extinction coefficient k) and film thickness, and it is generally believed that these parameters will not change. However, temperature has some influence on these parameters, resulting in changes in the spectral properties of the filter. The influence of temperature on the film mainly lies in the change of refractive index and thickness. If the coating material is not selected properly or the quality of the coating is poor, the influence o...

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Problems solved by technology

Spectrophotometers are generally used to detect spectral characteristics, but most spectrophotometers do not have the function of heating the sample, and can only perform spectral detection at room temperature

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