A low-temperature model of a long-wave imaging spectrometer and its assembly method
An imaging spectrometer and a spectrometer technology, which are applied in the field of imaging spectrometers, can solve the problems of reduced installation and adjustment accuracy, increased instrument volume, weight and power consumption, and increased difficulty in low-temperature optical installation and adjustment. The effect of increasing costs and reducing the difficulty of low-temperature assembly and adjustment
Active Publication Date: 2017-08-25
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, one of the consequences of the overall cooling of the optomechanical subsystem is that the volume, weight and power consumption of the instrument increase significantly, and the other is the increase in the difficulty of low-temperature optical assembly and the decrease in the accuracy of assembly
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] According to the above description, a better embodiment is given:
[0028] Table 1 Low temperature model parameters
[0029] Spectral range 8-12.5μm System F number 2 instantaneous field of view 0.75mrad spectral resolution Better than 50nm
[0030] Table 2 Design results
[0031]
[0032] According to the described adjustment method, the properties of the selected adjustment filter are: the center wavelength is 8.15 μm, the half maximum width is 125 nm; the selected infinity slit pair is 0.75 mrad. The final adjustment result can be achieved: the corresponding adjustment filter spectral lines on the photosensitive surface are in 39 columns, and the half-height width occupies 5 elements; the slit pairs are in 161 lines, and the light-dark contrast ratio is 0.1. The adjustment meets the design requirements.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a low-temperature model of a long-wave imaging spectrometer and an assembly method thereof. The low-temperature model is composed of a telescopic imaging mirror, a cold box, a spectrometer and a focal plane assembly. The telescopic imaging mirror is at room temperature, and the spectrometer is vacuum cooled. It is connected to the telescopic imaging mirror through the window of the cold box, and the spectrometer and the focal plane assembly are connected through a flexible connecting piece. The installation and adjustment method is to assemble the telescopic imaging mirror and spectrometer at room temperature, install the focal plane assembly to the flexible connector, install the telescopic imaging mirror and the flexible connector to the cold box, vacuum refrigeration the spectrometer, adjust the focal plane assembly at low temperature, and adjust it at low temperature Telescopic imaging mirror. In the present invention, only the rear spectrometer needs to be cooled, and the optical parts of the total reflection optical module are made of the same material, and the focal plane assembly with flexible connection is self-cooled, which reduces the cooling pressure, reduces the difficulty of installation and adjustment, and is easy to maintain system performance. It is suitable for application in the field of aerial remote sensing.
Description
technical field [0001] The invention relates to an imaging spectrometer in the field of remote sensing detection, in particular to a low-temperature model for an airborne or spaceborne long-wave infrared imaging spectrometer and an assembly method thereof. Background technique [0002] Since the 1990s, the United States took the lead in developing thermal infrared imaging spectrometers. Representative instruments include: In 1996, the SEBASS airborne infrared hyperspectral imager developed by the United States contained long-wave 7.5-13.5μm spectral bands, and spectral sampling 50nm, the instantaneous field of view is 1mrad, and the entire optical path is cooled with liquid helium. In 1997, the TIRIS-I airborne thermal infrared imaging spectrometer developed by the United States has a working band of 7.5-14.0 μm, 64 spectral bands, 100 μm spectral sampling, and a spatial resolution of 3.6mrad. Filters are mounted in the focal plane to suppress background radiation. After t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/28
Inventor 袁立银王建宇何志平李春来吕刚王跃明
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI