CN210953112U

CN210953112U - Long-focus composite light target simulator

Info

Publication number: CN210953112U
Application number: CN201921978088.9U
Authority: CN
Inventors: 郑昌盛
Original assignee: Chengdu Haofu Technology Co ltd
Current assignee: Chengdu Haofu Technology Co ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-07-07
Anticipated expiration: 2029-11-15

Abstract

The utility model relates to a long focus compound light target simulator, including fix the telescope optical system who is used for the light of outgoing simulation target source on the mount pad, compound light source and target surface assembly body, telescope optical system is cassegrain optical structure, set up the target surface assembly body on one side of the main reflector of telescope optical system, the target seat center of target surface assembly body sets up the through-hole that extends in the optical axis direction, the through-hole front end corresponds with main reflector one side centre bore of telescope system, the tail end of through-hole corresponds with compound light source, the side opening is set up by the through-hole, set up the target that is used for forming the light of outgoing into the simulation target in the hole section that the through-hole is close to compound light source one side, the light of outgoing through the target forms two bundles of light after the beam splitting of beam combination of beam splitter prism, one of them is parallel through cassegrain optical structure and is shone, another, the target holder and the composite light source are fixed on the same rigid bottom plate, and the rigid bottom plate is fixed on the mounting seat.

Description

Long-focus composite light target simulator

Technical Field

The utility model relates to a target simulation ware, concretely relates to compound light target simulation ware of long focus.

Background

The infrared optical imaging equipment is widely applied to the fields of security monitoring, intelligent guidance, medical treatment, scientific research and the like. In recent years, with the improvement of the performance and the reduction of the price of the tellurium-cadmium-mercury and indium antimonide infrared area array detectors, the application fields of the infrared area array detectors become wider, and higher requirements are put forward on the performance of an imaging system. In order to test the performance of an infrared imaging system, a target simulator capable of simulating infinite far infrared targets needs to be provided. Common target simulation ware adopts refraction and reflection formula optical structure, comprises aspheric surface speculum primary mirror and secondary reflector, and the mirror holder is traditional metallic structure, and present target simulation ware ubiquitous bore is little, the characteristics that the focus is short now, to heavy-calibre target simulation ware, often customization equipment, the price is up to several hundred thousand, more than million yuan even, need customize spare part when maintenance moreover, adopt this kind of customization target simulation ware not only with high costs, moreover the dress adjusts the difficulty, it is big to receive environmental impact.

Disclosure of Invention

The utility model aims at providing a long-focus composite light target simulator, which has simple structure, large caliber, long focus, good environmental adaptability and low cost; the device can be used for testing photoelectric detection systems such as photoelectric pods and the like, and can simulate targets at infinite distance, and the wave band range of the device covers visible light, near infrared, short wave infrared, medium wave infrared and the like.

The purpose of the utility model is realized like this: a long-focus composite light target simulator comprises a telescopic optical system, a composite light source and a target surface assembly body, wherein the telescopic optical system is fixed on a mounting seat and used for emitting light rays for simulating a target source, the telescopic optical system is of a Cassegrain optical structure, the target surface assembly body is arranged on one side of a main reflector of the telescopic optical system and comprises a target seat, a beam splitter prism combination, a camera and a target, the beam splitter prism combination, the target and the composite light source are located on an optical axis of the Cassegrain optical structure, a through hole extending in the optical axis direction is arranged in the center of the target seat of the target surface assembly body, the beam splitter prism combination is arranged in the center of the through hole, the front end of the through hole corresponds to a central hole in one side of the main reflector of the telescopic optical system, the tail end of the through hole corresponds to the composite light source, a side hole is arranged beside the through, the camera is located optical axis one side and is used for accepting the simulation light through the spectral prism combination reflection, sets up the target that is used for forming the light of outgoing simulation target in the hole section of through-hole near compound light source one side, and the light through the target outgoing forms two bundles of light after the spectral prism combination beam splitting, and one of them is parallel through cassegrain optical structure and jets out, and another bundle of reflection gets into the camera, the target stand is fixed on same rigid bottom plate with compound light source, rigid bottom plate fixes on the mount pad.

The target holder is characterized in that a first sleeve is sleeved in a through hole of the target holder, one end of the first sleeve is in butt joint with a Cassegrain telescopic optical system and locked, a second sleeve is sleeved in another end hole of the first sleeve, the front end of the second sleeve is provided with a beam splitter prism combination, the tail end of the second sleeve is sleeved with a third sleeve, and the front end of the third sleeve, sleeved in the second sleeve, is provided with a target penetrating through composite light.

The telescopic optical system comprises a hyperboloid main reflecting mirror and a hyperboloid secondary reflecting mirror, and is of an R-C structure.

The aperture of a main reflector of the R-C astronomical telescope is 300mm, the integral focal length is 2400mm, and a beam splitter prism combination is placed 40mm in front of a focus.

The main reflector and the secondary reflector are made of low-expansion quartz, and are plated with high-reflection films and silicon oxide protective films, and the surface accuracy exceeds 1/12 wavelengths.

The beam splitter prism combination is a cube formed by two right-angle prisms, and the right-angle prisms are made of zinc selenide.

The target is a metal cross target, the size of the metal cross target surface is 10mm, and the size of a target gap is 50 micrometers.

The whole frame of the telescope optical system adopts a frame support rod structure, a force bearing part in the frame support rod structure adopts carbon fiber materials, and a part in the frame support rod structure, which is parallel to the optical axis of the telescope optical system or has an included angle smaller than 45 degrees, adopts carbon fiber materials.

The composite light source is a halogen lamp.

Adopt above-mentioned scheme, beneficial effect is as follows, the utility model discloses can adopt the low-priced astronomical telescope's of current ripe technology, batch production component as the optical system that keeps a telescope, greatly reduced the cost of target simulation ware, but each spare part batch production of target simulation ware, during maintenance, satisfy interchangeability, the utility model discloses a target surface assembly body integration optical system that keeps a telescope, simple reliable, the target surface characteristic is easily changed. The utility model can be used for testing various photoelectric detection devices and adjusting the shaft, and has simple structure, large caliber, long focal length, good environmental adaptability and low cost; the device can be used for testing photoelectric detection systems such as photoelectric pods and the like, and can simulate targets at infinite distance, and the wave band range of the device covers visible light, near infrared, short wave infrared, medium wave infrared and the like.

The invention will be further explained with reference to the drawings and the specific embodiments.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of a target surface assembly.

In the drawing, 100 is a telescopic optical system, 110 is a main reflector, 120 is a secondary reflector, 200 is a composite light source, 300 is a target surface assembly, 310 is a target holder, 311 is a through hole, 312 is a side hole, 313 is a first sleeve, 314 is a second sleeve, 315 is a third sleeve, 320 is a beam splitter prism assembly, 330 is a camera, 340 is a target, and 400 is a rigid base plate.

Detailed Description

Specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 2, an embodiment of a long-focus composite light target simulator includes a telescopic optical system 100 fixed on a rigid mounting base for emitting light rays simulating a target source, a composite light source 200, and a target surface assembly 300, where the telescopic optical system 100 is a cassegrain optical structure, a main reflector 110 in the cassegrain optical structure is fixed on a base at the rear end of a mirror frame, and a secondary reflector in the cassegrain optical structure is fixed in the mirror frame through a spider frame. Preferably, in the cassegrain optical structure adopted by the telescopic optical system 100, the main reflector 110 is a hyperboloid reflector, the secondary reflector is a hyperboloid reflector, the caliber of the main reflector 110 of the R-C structure is 300mm, the overall focal length is 2400mm, in the R-C structure, the main reflector 110 and the secondary reflector 120 both adopt hyperboloid structures, two kinds of aberrations, namely spherical aberration and coma aberration, can be corrected, the field of view can be properly increased, and the R-C structure ensures that the whole target simulator has high precision and has the capability of testing large-caliber detection equipment. Furthermore, the R-C structure main reflector 110 is made of low-expansion quartz, the secondary reflector is made of low-expansion quartz, the main reflector 110 and the secondary reflector are both plated with high-reflection films and can also be plated with silicon oxide protective films, and the total reflectivity exceeds that of the traditional aluminized or silvered reflective films; the primary and secondary mirror surface types of precision exceed the 1/12 wavelengths of the simulated light. The whole of the mirror holder of telescope optical system 100 adopts frame bracing piece structure, the load part adopts carbon fiber material, the part parallel with telescope optical system 100 optical axis or contained angle is less than 45 in the frame bracing piece structure adopts carbon fiber material, the coefficient of thermal expansion is little, frame bracing piece structure receives cold and hot expansion volume little in the optical axis direction, be favorable to the reliable and stable in the big temperature range of system, it is few to ensure that entire system moves under the different temperature environment burnt, adopt carbon fiber material still to reduce weight, compare with traditional aluminum product, do not reduce the index in intensity and rigidity.

The target surface assembly 300 is arranged on one side of the main reflector 110 of the telescopic optical system 100, the target surface assembly 300 comprises a target holder 310, a beam splitter prism combination 320, a camera 330, a target 340 and a composite light source 200, wherein the beam splitter prism combination 320, the target 340 and the composite light source 200 are positioned on an optical axis of a cassegrain optical structure, a through hole 311 can be arranged in the center of the target holder 310 of the target surface assembly 300, and the beam splitter prism combination 320 is arranged in the center of the through hole 311. The front end of the through hole 311 corresponds to a central hole in one side of the main reflector 110 of the telescopic system, the tail end of the through hole 311 corresponds to the composite light source 200, a side hole 312 is formed beside the through hole 311, a camera 330 is arranged at the outer opening end of the side hole 312, the camera 330 is positioned on one side of an optical axis and used for receiving simulated light reflected by the beam splitter prism assembly 320, a target 340 is arranged in a hole section of the through hole 311 close to one side of the composite light source 200, the target 340 is positioned between the composite light source 200 and the beam splitter prism assembly 320, the target 340 is used for forming a simulated target with emergent light, and the emergent light of the target 340 forms two beams of light after being split by the beam splitter prism. One of the beams is emitted in parallel through the cassegrain optical structure for simulating an infinite target, and the other beam is reflected into the camera 330.

The target 340 is provided with a target hole for adjusting the light emitted by the composite light source 200 into a target shape, the target 340 can be a metal cross target, the size of the metal cross target surface is 10mm, the size of the target gap is 50 microns, the cross wire of the target surface of the camera 330 is just coincided with the cross of the metal cross target through debugging, and the combination can be used for target simulation and optical axis debugging of light paths such as televisions and lasers. The composite light source 200 can be a halogen lamp, the halogen lamp is placed behind a metal cross target, broad-spectrum radiation is emitted to illuminate the cross target surface to form a target of the target simulator, and the halogen lamp has a wide radiation spectrum band, so that the system can simulate targets from visible light to long-wave infrared. The backing plate 310 and the composite light source 200 are fixed on the same rigid base plate 400, and the rigid base plate 400 is fixed on a mounting seat.

In this embodiment, a first sleeve 313 is sleeved in a central through hole 311 of a target holder 310 of a target surface assembly 300, one end of the first sleeve 313 is butted with the cassegrain telescopic optical system 100 and locked, a second sleeve 314 is sleeved in a hole at the other end of the first sleeve, a beam splitter combination 320 is arranged at the front end of the second sleeve 314, a third sleeve 315 is sleeved at the tail end of the second sleeve 314, a target 340 which transmits composite light is arranged at the front end of the third sleeve 315 sleeved in the second sleeve 314, the target holder 310 and the composite light source 200 are fixed on the same rigid bottom plate 400, the rigid bottom plate 400 is fixed on a mounting seat, the target surface assembly 300 adopts a sleeve structure, and is simple and reliable, and the characteristics of the target surface are easy to replace,

by adopting the scheme, the broad-spectrum radiation emitted by the composite light source 200 illuminates the cross target surface to form the target of the target simulator, the light of the light passing through the target 340 is combined into a part of light through the prism to be reflected to the target surface of the camera 330, the part of light directly transmits through the cross target surface to be used for simulating the target at infinity, the cross wire of the target surface of the camera 330 is just coincided with the cross of the metal cross target through debugging, and the combination can be used for target simulation and optical axis debugging of optical paths such as televisions and lasers. The utility model discloses can adopt the low-priced astronomical telescope system of current mature technology, batch production as telescope optical system 100, greatly reduced the cost of target simulator, the utility model discloses a target surface assembly body 300 is integrated into astronomical telescope, and is simple reliable, and the target surface characteristic is easily changed. The utility model can be used for testing various photoelectric detection devices and adjusting the shaft, and has simple structure, large caliber, long focal length, good environmental adaptability and low cost; the device can be used for testing photoelectric detection systems such as photoelectric pods and the like, and can simulate targets at infinite distance, and the wave band range of the device covers visible light, near infrared, short wave infrared, medium wave infrared and the like.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is obvious that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A long-focus composite light target simulator is characterized in that: the combined type optical target comprises a telescopic optical system (100), a composite light source (200) and a target surface assembly body (300), wherein the telescopic optical system (100) is fixed on a mounting seat and used for emitting light rays simulating a target source, the target surface assembly body (300) is arranged on one side of a main reflector (110) of the telescopic optical system (100), the target surface assembly body (300) comprises a target seat (310), a beam splitter prism combination (320), a camera (330) and a target (340), the beam splitter prism combination (320), the target (340) and the composite light source (200) are located on an optical axis of the cassegrain optical structure, a through hole (311) extending in the direction of the optical axis is arranged in the center of the target seat (310) of the target surface assembly body (300), the beam splitter prism combination (320) is arranged in the center of the through hole (311), and the front end of the through hole (311) corresponds to a central hole on one side of the main reflector (110) of the telescopic optical, the tail end of through-hole (311) is corresponding with compound light source (200), through-hole (311) other side sets up side opening (312), the outer mouth end of side opening (312) sets up camera (330), camera (330) are located optical axis one side and are used for accepting the simulated light through beam splitter prism combination (320) reflection, and through-hole (311) are close to set up in the hole section of compound light source (200) one side and are used for forming the light of outgoing target (340) of simulation target, and the light through target (340) outgoing forms two bundles of light after beam splitter prism combination (320) beam splitting, and one of them is through cassegrain optical structure parallel shooting, and another bundle of reflection gets into camera (330), target stand (310) are fixed on same rigid bottom plate (400) with compound light source (200), rigid bottom plate (400) are fixed on the mount pad.

2. The long-focus composite light target simulator of claim 1, wherein: first sleeve (313) is put to the cover in through-hole (311) of target holder (310), first sleeve (313) one end and cassegrain telescope optical system (100) butt joint and locking, cup joint second sleeve (314) in the other end aperture of first sleeve, the front end of second sleeve (314) sets up beam splitting prism combination (320), the tail end of second sleeve (314) cup joints third sleeve (315), the front end that third sleeve (315) cup jointed in second sleeve (314) sets up through the target (340) of compound light.

3. The long-focus composite light target simulator of claim 1, wherein: the telescopic optical system (100) comprises a hyperboloid main reflecting mirror (110) and a hyperboloid secondary reflecting mirror, and the telescopic optical system (100) is of an R-C structure.

4. The long-focus composite light target simulator of claim 3, wherein: the aperture of a main reflector (110) of the R-C astronomical telescope is 300mm, the integral focal length is 2400mm, and a beam splitter prism assembly (320) is arranged 40mm in front of a focus.

5. The long-focus composite light target simulator of claim 3, wherein: the main reflector (110) and the secondary reflector are made of low-expansion quartz, and the surface accuracy exceeds 1/12 wavelengths.

6. The long-focus composite light target simulator of claim 5, wherein: the primary reflector (110) and the secondary reflector are both plated with a high-reflection film and a silicon oxide protective film.

7. The long-focus composite light target simulator of claim 1, wherein: the beam splitting prism combination (320) is a cube formed by two right-angle prisms, and the right-angle prisms are made of zinc selenide.

8. The long-focus composite light target simulator of claim 1, wherein: the target (340) is a metal cross target, the size of the metal cross target surface is 10mm, and the size of a target gap is 50 micrometers.

9. The long-focus composite light target simulator of claim 1, wherein: the whole frame of the telescope optical system (100) adopts a frame support rod structure, the force bearing part in the frame support rod structure adopts carbon fiber materials, and the parts in the frame support rod structure, which are parallel to the optical axis of the telescope optical system (100) or have an included angle smaller than 45 degrees, adopt carbon fiber materials.

10. The long-focus composite light target simulator of claim 1, wherein: the composite light source (200) is a halogen lamp.