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Filtering device with adjustable central wavelengths

A technology of center wavelength and filter device, applied in the field of filter, can solve the problems of difficult application system, low cooling efficiency of thermoelectric cooler TEC, poor system stability, etc., to achieve good stability, improved tuning accuracy, and simplified structure. Effect

Active Publication Date: 2013-09-04
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

However, due to the low cooling efficiency and poor system stability of the thermoelectric cooler TEC, it is difficult to apply to the system, thus limiting its application.

Method used

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  • Filtering device with adjustable central wavelengths
  • Filtering device with adjustable central wavelengths
  • Filtering device with adjustable central wavelengths

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Embodiment Construction

[0014] see figure 1 , figure 2 with image 3 , figure 1 , figure 2 with image 3 It is a schematic diagram of the structure of the central wavelength tunable filter device and central wavelength feedback adjustment of the present invention. It can be seen from the figure that the central wavelength tunable filter device of the present invention includes a narrow-band filter 1, which is characterized in that the narrow-band filter 1 is placed in the clamp 2 and fixed together with the pressure ring 3, the heat preservation cover 4, heat preservation The cover 5, the first thermal insulation lens 7 and the second thermal insulation lens 8 form a closed space to fix the clamp 2, and a counterbore is respectively opened on the sides of the thermal insulation cover 4 and the thermal insulation cover 5 to fix the The first heat preservation lens 7 and the second heat preservation lens 8, the second heat preservation lens 8, the narrow-band filter 1 and the first heat preserva...

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Abstract

The invention relates to a filtering device with adjustable central wavelengths. The filtering device is composed of a narrow bandpass filter, a clamp, a pressing ring, a heat preservation cover, a heat preservation cover cap, a thermistor, a first heat preservation lens, a second heat preservation lens, a servo turntable, a heating resistor, a light splitter mirror, a wavelength meter and a controller. The filtering device is high in adaptive capacity to the environment, can normally work under the condition that temperature fluctuation is large, has the advantages of being simple in structure, convenient to operate and high in central wavelength tuning accuracy, and can be applied to an optical system with strict requirements for the spectrum central wavelengths under the temperature alternating condition.

Description

technical field [0001] The invention relates to light filtering, in particular to a light filtering device with adjustable center wavelength. Background technique [0002] Due to the temperature-sensitive characteristics of the narrow-band filter, when it is used in an optical system with alternating high and low temperatures, it is generally necessary to use a thermoelectric cooler TEC for two-way temperature control, that is, cooling temperature control at high temperature and heating temperature control at low temperature. By changing The working temperature of the filter adjusts the central wavelength of the spectrum passing through the filter, and at the same time, the stability of the central wavelength of the spectrum passing through the filter is ensured by the temperature control accuracy of the filter. However, due to the low cooling efficiency and poor system stability of the thermoelectric cooler TEC, it is difficult to apply it in the system, thus limiting its a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20
Inventor 耿立明贺岩李小莉李蕊杨燕王志君侯霞陈卫标
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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