CN106707446A - High-precision multi-spectrum polarizing light filter wheel - Google Patents

Abstract

The invention discloses a multi-spectral polarization filter wheel. The filter wheel is a disc structure, including a shaft sleeve, a heat-insulated inner ring and a metal outer ring. The material of the shaft sleeve and the metal outer ring is aluminum LY-12, and the material of the heat-insulated inner ring is non-metallic material FRP, and the metal outer ring There are 16 light holes evenly distributed on the top. The advantages of the filter wheel are: high dimensional accuracy and temperature control accuracy; special groove design, which is conducive to the installation of polarizers and filters; lightweight design, reducing the moment of inertia of the filter wheel.

Description

A high-precision multispectral polarization filter wheel

technical field

The invention relates to the technology of precision optical mechanical parts of aerospace remote sensing instruments, in particular to a filter wheel for spectrum separation and polarization separation.

Background technique

It is one of the key technologies of some optical remote sensing detection instruments to use the filter wheel mechanism for spectrum and polarization analysis. Some foreign spectral and polarization remote sensing instruments also adopt this design method, which has good reliability and simple structure. However, due to technical blockade, it is not easy to obtain the specific design details of foreign filter wheel mechanisms. It must be designed independently to realize the functions of spectral analysis and polarization analysis, and to meet the requirements of stable temperature environment, high installation accuracy, and small load inertia.

Contents of the invention

The invention adopts the filter wheel mode to solve the problem of spectrum division and polarization division of the optical remote sensing instrument, and realizes the detection function of multi-spectrum and multi-polarization of the instrument.

A multi-spectral polarization filter wheel, composed of a shaft sleeve 1, a heat-insulating inner ring 2, and a metal outer ring 3, characterized in that:

The shaft sleeve 1 and the heat-insulating inner ring 2 are connected together through a threaded structure, and the heat-insulated inner ring 2 and the metal outer ring 3 are connected together through a threaded structure; 16 metal outer rings 3 are evenly distributed on the filter wheel The light hole of the filter and the polarizer can be installed, and the circumference of the light hole is "Ω" shape, and its straight edge is used for the installation and positioning of the polarizer or the filter.

The material of the heat-insulating inner ring 2 is fiberglass, and there are 8 weight-reducing grooves in the middle.

The advantages of this filter wheel are:

It has high dimensional accuracy and temperature control accuracy. It has a special slot design, which facilitates the installation of polarizers and filters.

Description of drawings

Figure 1 is a structural diagram of the filter wheel.

Fig. 2 is a cutaway structure diagram of the filter wheel.

Including 1-shaft sleeve, 2-insulated inner ring, 3-metal outer ring.

detailed description

The present invention comprises a shaft sleeve 1 , a thermal insulation inner ring 2 and a metal outer ring 3 . There are 16 round light holes arranged on the metal outer ring 3, which are evenly distributed on the metal outer ring 3. The angle between the two round holes relative to the center is 22.5°±5", which are mainly used to place optical lenses such as optical filters and polarizers. The shaft sleeve 1 and the metal outer ring are made of LY-12 aluminum, and the heat-insulated inner ring is made of glass fiber reinforced plastic. There are 16 notches (as shown in Figure 1) on the outer edge of the metal outer ring 3 to reduce its weight and inertia force during rotation. The heat-insulating inner ring is injection-molded between the shaft sleeve 1 and the metal outer ring 3 to make it a solid whole. Symmetrical weight-reducing grooves are opened on the surface of the heat-insulating inner ring to reduce the weight of the filter wheel.

Claims (2)

1. A multi-spectral polarization filter wheel, consisting of a shaft sleeve (1), a heat-insulating inner ring (2), and a metal outer ring (3), is characterized in that: The shaft sleeve (1) and the heat-insulating inner ring (2) are connected together by a threaded structure, and the heat-insulated inner ring (2) and the metal outer ring (3) are connected together by a threaded structure; the filter wheel metal On the outer ring (3) are evenly distributed 16 light-through holes that can be installed with optical filters and polarizers. The circumference of the light-through holes is in the shape of "Ω", and its straight sides are used for the installation and positioning of polarizers or optical filters. 2. According to claim 1, it is characterized in that: the material of the heat-insulating inner ring (2) is fiberglass, and there are 8 weight-reducing grooves in the middle.