The invention discloses an infrared imaging spectral measurement system based on a gradual filter and specifically relates to the technical field of spectral data measurement. The infrared imaging spectral measurement system solves a problem that a conventional imaging spectral system is poor in spectral resolution, has spectral line bending and spectral line color distortion, highly requires design, processing, and adjustment precision, and is high in price. The infrared imaging spectral measurement system based on a gradual filter comprises a control and signal processing module, a prepositioned optical system, a light splitting imaging module, a micro filter and detector module, a signal detection and data acquisition module, a data preprocessing module, and an information processing unit, wherein the prepositioned optical system, the light splitting imaging module, and the micro filter and detector module are disposed successively, and the signal detection and data acquisition module, the data preprocessing module, and the information processing unit are in signal connection.

Infrared imaging spectral measurement system based on gradual filter

The invention discloses a high-performance imaging spectrometer with a high space and high spectral resolution, and relates to the remotely-sensed imaging technology. The high-performance imaging spectrometer comprises a spectrometer, a movement platform, an object stage, a scaling device, an auxiliary optical device, a platform control cabinet and a control computer, wherein corresponding software is copied in the control computer in advance. The spectrometer disclosed by the invention is characterized in that the technical indexes are as follow: the spatial resolution is 0.5mm, the spatial resolution is 3-5nm, the visible light-wave infrared zone in the spectral region is 0.4-2.5 mu m, the signal-to-noise ratio of the main spectral region is more than 3000, and the radiation calibration can be accurately carried out.

High-performance imaging spectrometer with high space and high spectral resolution

The invention discloses a double-optical path switching imaging spectral system, which comprises an oscillating mirror scanning unit, an optical path switching unit, a spectral light splitting unit, and a detection unit; the oscillating mirror scanning unit bears a ground object sample to be detected; the light generated by diffuse reflection of the ground object sample in the oscillating mirror scanning unit enters the spectral light splitting unit; the spectral light splitting unit performs light splitting processing of the diffuse reflection light, and then converges the light into the detection unit; the detection unit performs spectral imaging According to the double-optical path switching imaging spectral system of the embodiment, the light generated by diffuse reflection of the ground object sample born by the oscillating mirror scanning unit enters the spectral light splitting unit, the spectral light splitting unit processes the diffuse reflection light, and then converges the light into the detection unit, and the detection unit performs spectral imaging When the system is in a preview mode, the double optical path switching unit enables the system to only have the imaging function, which allows rapid preview of the imaged ground object area before the spectral imaging mode, and allows rapid selection of a ground object of interest or spectral imaging

Double-optical path switching imaging spectral system

A Field Imaging Spectrometer System (FISS) based on a cooling area CCD was developed. This paper describes the principle, structural design, main technology parameters and data processing flow, as well as some application experiments using the FISS instrument. The FISS instrument shows huge potential applications in geology, food, agriculture, forestry and other respective field.

A Field Imaging Spectrometer System

The invention provides a scanning imaging spectrometer system. The system comprises an imaging lens unit, a scanning unit, a previewing imaging unit, a spectrum light splitting unit, a detection unit and a computer unit, wherein the scanning unit comprises a swinging lens; switching between a previewing mode and a spectral imaging mode of the system is realized; when the system is in the previewing mode, the swinging lens reflects a diffuse reflection optical signal to the previewing imaging unit in static state; when the system is in the spectral imaging mode, the swinging lens reflects the diffuse reflection optical signal to the spectral light splitting unit in swinging state. According to the invention, switching between the previewing mode and the spectral imaging mode of the system is realized through the swinging lens, so that an imaging area can be previewed before the spectral imaging mode; imaging area selection time can be reduced; the efficiency of the system is improved; field effective lighting is effectively utilized; the defects that spectral imaging process is relatively slow, and relatively long in time, and is not suitable for selecting viewing field area are overcome.

Scanning imaging spectrometer system

The invention discloses a spliced imaging system based on an axis-shifting principle, comprising at least one imaging lens and at least one imaging device, wherein the imaging lens is arranged on the same plane and has same focal length and view field; the imaging device is arranged on the focal plane of each imaging lens; each imaging lens is set into a mode that the optical axis of the imaging lens is vertical to the focal plane thereof; and each imaging device is set into a mode that the focal plane of the imaging device has preset axis-shifting amount. The system disclosed by the invention overcomes the defects in the traditional multiple-camera imaging technology that later-stage image processing has high complexity under the condition of inclined imaging, and precise simultaneous exposure cannot be realized under the condition of vertical imaging. In addition, the spliced imaging system expands the imaging range under the vertical installation condition of the cameras.

Spliced imaging system based on axis-shifting principle

The invention belongs to the fields of remote sensing technology and the spectrum technology and relates to a system that obtains spectroscopic data of surface features on the ground and preprocesses the data. The system comprises an imaging spectroscopic data obtaining module, a data collecting, storing and processing module, a drive controlling module and a multifunction system platform. Surface features are imaged through a slot vertical to the orbital direction. The light beams set off from the collimation mirror are parallel to each other. Upon penetrating a dispersion device, the light beams disperse in the direction of the vertical strips according to the light spectrum and are imaged on the photosensitive surface of the detector after penetrating the convergent mirror. Then further data processing and image display are conducted. The ground imaging spectral measurement system of the invention can obtain uninterrupted imaging spectroscopic data of the surface features with highspectral and spacial resolutions. By utilizing the matched controlling software and data processing software, functions like the control and playback of data measurement, data calibration, and obtaining light spectrum features can be achieved. Thereby, the technological problem of imaging the motional light spectrum of unemotional targets is solved.

Ground imaging spectral measurement system

The invention discloses an interference imaging spectrometer hyperspectral data simulation method for lunar-surface minerals. The hyperspectral data simulation method for lunar-surface minerals is characterized by comprising the following steps of: S1, resampling the spectral curve of the known lunar mineral sample by use of a Gauss spectral response model; S2, establishing pure mixed spectral image data; S3, calculating the real data signal-to-noise ratio of the interference imaging spectrometer; and S4, adding noise to the simulated data by referring to the real interference imaging spectrometer data noise distribution. The interference imaging spectrometer hyperspectral data simulating the lunar-surface minerals can be applied to the verification and precision evaluation of the algorithms such as end member extraction, mixed pixel decomposition, mineral abundance inversion and the like of the real interference imaging spectrometer data so as to compensate for the deficiencies of the lunar-surface sampling data and verification data.

Interference imaging spectrometer hyperspectral data simulation method for lunar-surface minerals

A combined spectral curve is measured by the traditional field spectrometers in a narrow or wide field range, and the traditional spectral curves are mixed inherently because of the low spatial resolving power. So the mixed spectral pixels were used in the traditional works on the mixed pixel decomposition. A new measure method is proposed to replace the point measurement. The spectral data is captured by the dispersal unit, and one spatial data is from the imaging CCD, and another is captured by the scanning mirror. By the new imaging spectrometer, the target image and spectral curves of
every image pixel are captured simultaneously with high spatial resolution. The captured spectral curves could be regarded as the pure curves, which are very useful for the model foundation and analysis of mixed pixel and pixel decomposition. The basic dispersal principle and imaging mode is introduced in this paper. The detailed design is given by the general diagram and the composition figure. The methods and flow chart of the geometric correction and
radiometric calibration are discussed in detail. Some experiments are carried out to measure the vegetation and other typical targets, the results of the images and spectral curves are given and discussed.

Qingxi Tong

Papers

Spliced imaging system based on axis-shifting principle

Ground imaging spectral measurement system

Interference imaging spectrometer hyperspectral data simulation method for lunar-surface minerals

The principle and experiments of a new field imaging spectrometer