CN109765685B - Double-view-field transmission type multi-sensor single-aperture optical system - Google Patents
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Abstract
The invention provides a double-view-field transmission type multi-sensor single-aperture optical system which comprises a wide-spectrum common transmission telescopic component 1, an FSM component 2, a spectrum light splitting component 3, a laser component 4, a television relay component 5, a CCD component 6, a thermal image relay component 7 and an infrared detector component 8, wherein the wide-spectrum common transmission telescopic component is used for transmitting a wide spectrum signal; incident light reaches the spectral light splitting assembly 3 through the wide-spectrum shared transmission telescope assembly 1 and the plane reflector 2-1 of the FSM assembly 2, is transmitted into the small-field thermal image relay assembly 7 through the first light splitting lens 3-1, and finally reaches the infrared detector assembly 8; reflected into a second beam splitter 3-2; the reflected light is reflected by the second beam splitter 3-2 to reach the laser reflector 4-1 and finally reach the laser component 4; the transmission enters the television relay assembly 5 and finally reaches the CCD assembly 6. The system has high integration level, a search and tracking double-field coaxial fusion design, can realize stable aiming lines of all sensors, and simultaneously solves the problem of aberration of single-aperture optics in infrared, television and laser spectrums by utilizing the dispersion matching optimization of a multispectral optical material.
Description
Technical Field
The invention belongs to the technical field of optics, relates to a multispectral multisensor common-aperture optical system, and particularly relates to a double-view-field transmission type multisensor single-aperture optical system with a large view field and a small view field.
Background
With the development of informatization, networking and coordination of the requirements of photoelectric equipment, the photoelectric system is developed in the directions of multifunction, high performance, far visual range and information fusion, and the photoelectric load needs to be light and small, so that the integration level of the photoelectric system is improved.
Common photoelectric sensors equipped in domestic stabilized sighting photoelectric systems comprise televisions, infrared thermographs and lasers, and the photoelectric systems are large in size and weight due to the fact that the sensors are arranged in an independent modular split mode and respectively have respective optical systems and windows. Meanwhile, each sensor of the independent modular split type integrated system has an optical axis, so that the optical axis of the large-view-field target searching system is often inconsistent with the optical axis of the small-view-field target tracking system. In addition, the stabilized sighting photoelectric system adopts a frame integral stabilization mode, the stabilization precision of the stabilized sighting photoelectric system is in the mrad magnitude, the stabilized sighting photoelectric system is close to the limit, and the sighting line stability cannot be further improved.
Related reports of realizing miniaturization, light weight and high-precision stability of a dual-view-field multispectral common-aperture optical system integrating a television, a laser and an infrared sensor are not seen at home, and related patents of American thunder company and Rockschid Martin company are available abroad. The optical system described in US thunder corporation patent US6174061 integrates infrared and laser photoelectric sensors, the head common-aperture optical lens adopts a wide-spectrum cassegrain reflective objective lens, small-field infrared thermal imaging and laser detection are respectively realized by spectral beam splitting after passing through an intermediate image plane, and infrared large-field thermal imaging and small-field thermal imaging share the same detector by driving/punching a reflector juxtaposed at the back of a beam splitter. However, the invention only integrates the laser and infrared photoelectric sensors, and is not provided with a television sensor, so that the integration level is not high. In the system, although the large and small infrared fields of view share the detector, the optical apertures are independent from each other, and the optical axes are not consistent. The multispectral multisensor common-aperture optical system described in US6359681 to rockschid martin integrates television, infrared and laser photosensors and utilizes FSM to achieve line-of-sight stabilization of infrared and laser. The optical channel of the television sensor does not pass through the FSM, and the stability of the aiming line of the television cannot be considered.
Disclosure of Invention
The invention provides a double-view-field transmission type multi-sensor single-aperture optical system, which is high in integration level, designed by the coaxial fusion of search and tracking double view fields and capable of realizing the stability of the aiming line of each sensor, and aims to solve the problems that the conventional multi-spectrum multi-sensor common-aperture optical system is not high in integration level, the optical axes of the search and tracking view fields are not consistent, and the stability of the aiming lines of infrared, television and laser cannot be considered by an IMS/FSM (information management system/finite state machine). Meanwhile, the chromatic dispersion matching optimization of the multi-spectrum optical material is utilized to solve the aberration problem of single-aperture optics in infrared, television and laser spectral bands.
The technical scheme of the invention is as follows:
the double-view-field transmission type multi-sensor single-aperture optical system is characterized in that: the system comprises a wide spectrum shared transmission telescopic assembly 1, an FSM assembly 2, a spectrum light splitting assembly 3, a laser assembly 4, a television relay assembly 5, a CCD assembly 6, a thermal image relay assembly 7 and an infrared detector assembly 8;
the wide-spectrum shared transmission telescope component 1 consists of a wide-spectrum objective lens group 1-1, a refraction plane reflector 1-2 and a wide-spectrum eyepiece lens group 1-3, and the aberration of three spectral sections, namely, a medium wave infrared light with the wavelength of 3.7-4.8 mu m, a visible light with the wavelength of 0.6-0.8 mu m and a laser with the wavelength of 1.064 mu m is balanced;
the FSM component 2 consists of a plane mirror 2-1 and a driver 2-2;
the spectral light splitting component 3 consists of a first color separation plate 3-1 and a second color separation plate 3-2;
the laser component 4 consists of a laser shared component 4-1, a laser 4-2 and a laser receiving component 4-3;
incident light reaches the spectral light splitting assembly 3 through the wide-spectrum shared transmission telescope assembly 1 and the plane reflector 2-1 of the FSM assembly 2, enters the thermal image relay assembly 7 through the transmission of the first light splitting lens 3-1, and finally reaches the infrared detector assembly 8; the light reflected by the first spectroscope 3-1 enters a second spectroscope 3-2; the light reflected by the second beam splitter 3-2 reaches the laser component 4; the light transmitted through the second beam splitter 3-2 enters the television relay assembly 5 and finally reaches the CCD assembly 6.
In a further preferred aspect, the dual-field-of-view transmissive multi-sensor single-aperture optical system is characterized in that: the wide-spectrum objective lens group 1-1 consists of multispectral ZnS and single crystal CaF2And 3 single crystal sapphire lenses, wherein the surface shapes are spherical and the calibers
The refraction plane reflector 1-2 is arranged 84.2mm behind the wide-spectrum objective lens group 1-1 and is obliquely arranged at an included angle of 45 degrees with an optical axis, the material is optical quartz glass, and the external dimension is 125mm multiplied by 96mm multiplied by 10 mm; the wide spectrum eyepiece group 1-3 is placed at 80mm position behind the folding plane reflector 1-2, and is formed from multispectral ZnS and single crystal BaF2And chemical vapor deposition ZnSe3 sheet lens, the surface shape is spherical, and the caliber is
The wide-spectrum objective lens group 1-1, the refraction plane reflector 1-2 and the wide-spectrum eyepiece lens group 1-3 form a Galilean telescope without a real focus, and the multiplying power gamma is 3.4.
In a further preferred aspect, the dual-field-of-view transmissive multi-sensor single-aperture optical system is characterized in that: the plane reflector 2-1 is arranged at 42mm of the rear end of the wide spectrum ocular lens group 1-3 and is obliquely arranged at an included angle of 45 degrees with an optical axis, the material is optical quartz glass, and the external dimension is 56mm multiplied by 45mm multiplied by 6 mm.
In a further preferred aspect, the dual-field-of-view transmissive multi-sensor single-aperture optical system is characterized in that: the driver 2-2 adopts a piezoelectric ceramic driving device to drive the plane mirror 2-1 to quickly deflect to realize the secondary stability of the FSM, and the compensation frame is combined with a primary stable residual error.
In a further preferred aspect, the dual-field-of-view transmissive multi-sensor single-aperture optical system is characterized in that: the first color separation flat plate 3-1 is arranged at the position 80mm away from the rear end of the plane reflector 2-1 and is obliquely arranged at an angle of 45 degrees with the optical axis, the material is single crystal sapphire, and the external dimension is 62mm multiplied by 48mm multiplied by 5 mm; the incident surface of the first color separation flat plate 3-1 is plated with a color separation film which transmits the medium wave infrared of 3.7-4.8 mu m, reflects the visible light of 0.6-0.8 mu m and reflects the laser of 1.064 mu m; the outgoing surface of the first color separation flat plate 3-1 is plated with a medium wave infrared antireflection film with the thickness of 3.7-4.8 mu m; the second color separation plate 3-2 is arranged in the reflection direction of the first color separation plate 3-1, is arranged in parallel with the first color separation plate 3-1 at a distance of 75mm, is made of HK9L optical glass and has the external dimension of 62mm multiplied by 44mm multiplied by 6 mm; the incident surface of the second dichroic flat plate 3-2 is plated with a dichroic film which transmits visible light with the wavelength of 0.6-0.8 mu m and reflects laser with the wavelength of 1.064 mu m; the outgoing surface of the second dichroic flat plate 3-2 is plated with a visible light antireflection film with the thickness of 0.6-0.8 μm.
In a further preferred aspect, the dual-field-of-view transmissive multi-sensor single-aperture optical system is characterized in that: the laser shared component 4-1 consists of a laser relay component 4-1-1, a lambda/4 wave plate 4-1-2 and a dichroic prism 4-1-3; the laser receiving component 4-3 consists of a narrow-band optical filter 4-3-1, a laser converging component 4-3-2 and a laser receiver 4-3-3; the laser relay assembly 4-1-1 consists of 4 HK9L lenses, the surface shapes are all spherical, and the caliber is spherical
The lambda/4 wave plate 4-1-2 material is optical glass with caliber
The color separation prism 4-1-3 is formed by gluing 2 HK9L right-angle prisms, and the color separation film with 1.064 μm laser p-light reflection and s-light transmission is plated on the light separation surface, and the size is 40mm multiplied by 32mm multiplied by 6 mm; the narrow-band filter 4-3-1 is made of HK9L and is plated with a 1.064 μm narrow-band filter film with a caliber of
The laser convergence component 4-3-2 consists of 2 HK9L lenses, the surface shapes are all spherical, and the caliber is
The laser 4-2 is a YAG solid laser and generates pulse laser with the diameter of 1.064 mu m; the laser receiver 4-3-3 is an avalanche diode.
In a further preferred aspect, the dual-field-of-view transmissive multi-sensor single-aperture optical system is characterized in that: the working spectral range of the thermal image is 3.7-4.8 microns, the large view field is 3 degrees multiplied by 2.3 degrees, the small view field is 0.7 degrees multiplied by 0.53 degrees, the F number of the system is 5.5, the image height is 12mm, and the large view field and the small view field of the thermal image are switched by driving the variable-power group into the thermal image relay assembly.
In a further preferred aspect, the dual-field-of-view transmissive multi-sensor single-aperture optical system is characterized in that: the working spectral range of the television is 0.6-0.8 μm, the large view field is 3 degrees multiplied by 2.3 degrees, the small view field is 0.7 degrees multiplied by 0.53 degrees, the F number of the system is 6, the image height is 7.04mm, and the switching of the large view field and the small view field of the television is realized by driving in and out the zoom group in the television relay assembly.
Advantageous effects
The invention provides a double-view-field multi-sensor transmission type achromatic single-aperture optical system, which solves the problem of aberration of single-aperture optics in infrared, television and laser spectrums by using the dispersion matching optimization of a multispectral optical material.
Drawings
FIG. 1 is a schematic diagram of the system components of the present invention.
FIG. 2 is a schematic diagram of thermal image light paths, wherein zoom groups 7-3-1 and 7-3-2 are driven in and out to realize field switching of large and small field thermal images.
Fig. 3 is a schematic diagram of laser emitting and receiving optical paths.
Fig. 4 is a schematic diagram of the optical path of a television. In the figure, zoom groups 5-3-1 and 5-3-2 are driven in and out to realize the view field switching of large and small view field televisions.
Detailed Description
The invention is described in detail below with reference to the drawings and preferred embodiments:
the preferred embodiment of the invention aims at integrating double-view-field infrared thermography, a double-view-field television and a laser photoelectric sensor and a multispectral single-aperture optical system containing an FSM (finite state machine), so that the compactness and high integration of the system are realized. The FSM is arranged in the common-aperture light path, and can complete small-field thermal imaging and stable aiming lines of a television and laser.
As shown in fig. 1, the optical system of the preferred embodiment of the present invention includes a wide spectrum common transmission telescopic assembly 1, a FSM assembly 2, a spectrum splitting assembly 3, a laser assembly 4, a television relay assembly 5, a CCD assembly 6, a thermographic relay assembly 7, and an infrared detector assembly 8.
The wide-spectrum shared transmission telescope assembly 1 consists of a wide-spectrum objective lens group 1-1, a refraction plane reflector 1-2 and a wide-spectrum eyepiece lens group 1-3. The telescope component must balance aberration in three spectral bands of 3.7-4.8 μm medium wave infrared, 0.6-0.8 μm visible light and 1.064 μm laser, especially aberration correction. Table 1 shows the properties of the optical material according to the multispectral spectrum.
TABLE 1 optical Properties of Multi-spectral optical Material
Determining CaF according to achromatic matching formula (1)2Or BaF2One of, sapphire and MgF2Or ZnSe can form the preferable matching combination of the medium wave infrared, visible light and laser three-color achromatic multispectral material.
ε1The primary chromatic dispersion radius is preferably close to 0;
1. 3 are respectively a television and a medium wave infrared band;
A. b is 2 optical materials in pairs respectively;
v is the Abbe number of the optical material.
The broad-spectrum objective lens group 1-1 is composed of multispectral ZnS (because of the materials satisfying the engineering increase), single crystal CaF2And 3 single crystal sapphire lenses, wherein the surface shapes are spherical and the calibers
The refraction plane reflector 1-2 is arranged 84.2mm behind the wide-spectrum objective lens group 1-1 and is obliquely arranged at an included angle of 45 degrees between the Y-Z direction and the optical axis, the material is optical quartz glass, and the external dimension is 125mm multiplied by 96mm multiplied by 10 mm; the wide spectrum eyepiece group 1-3 is placed at 80mm position behind the folding plane reflector 1-2, and is formed from multispectral ZnS and single crystal BaF2And chemical vapor deposition ZnSe3 sheet lens, the surface shape is spherical, and the caliber is
The wide-spectrum objective lens group 1-1, the refraction plane reflector 1-2 and the wide-spectrum eyepiece lens group 1-3 form a Galilean telescope without a real focus, and the multiplying power gamma is 3.4.
FSM assembly 2 consists of a plane mirror 2-1 and a driver 2-2. The plane reflector 2-1 is arranged at 42mm of the rear end of the wide spectrum ocular lens group 1-3 and is obliquely arranged at an included angle of 45 degrees with the optical axis in the Y-Z direction, the material is optical quartz glass, and the external dimension is 56mm multiplied by 45mm multiplied by 6 mm. The driver 2-2 adopts a piezoelectric ceramic driving device to drive the plane mirror 2-1 to quickly deflect to realize FSM secondary stability so as to compensate the frame combination primary stability residual error.
The spectral splitting assembly 3 is composed of a first dichroic plate 3-1 and a second dichroic plate 3-2. The first color separation flat plate 3-1 is arranged at the position 80mm of the rear end of the plane reflector 2-1 and is obliquely arranged at an angle of 45 degrees with the optical axis in the Y-Z direction, the material is single crystal sapphire, and the external dimension is 62mm multiplied by 48mm multiplied by 5 mm. The incident surface of the first color separation flat plate 3-1 is plated with a color separation film which transmits the medium wave infrared of 3.7-4.8 mu m, reflects the visible light of 0.6-0.8 mu m and reflects the laser of 1.064 mu m; the outgoing surface of the first color separation flat plate 3-1 is plated with a medium wave infrared antireflection film with the thickness of 3.7-4.8 μm. The second color separation plate 3-2 is arranged in the reflection direction of the first color separation plate 3-1 and is arranged in parallel with the first color separation plate 3-1 at a distance of 75mm, and is made of HK9L optical glass with the external dimension of 62mm multiplied by 44mm multiplied by 6 mm. The incident surface of the second dichroic flat plate 3-2 is plated with a dichroic film which transmits visible light with the wavelength of 0.6-0.8 mu m and reflects laser with the wavelength of 1.064 mu m; the outgoing surface of the second dichroic flat plate 3-2 is plated with a visible light antireflection film with the thickness of 0.6-0.8 μm.
The laser lighting assembly 4 consists of a laser sharing assembly 4-1, a laser 4-2 and a laser receiving assembly 4-3. The laser shared component 4-1 consists of a laser relay component 4-1-1, a lambda/4 wave plate 4-1-2 and a dichroic prism 4-1-3. The laser receiving component 4-3 consists of a narrow-band optical filter 4-3-1, a laser converging component 4-3-2 and a laser receiver 4-3-3. The laser relay assembly 4-1-1 consists of 4 HK9L lenses, the surface shapes are all spherical, and the caliber is spherical
The lambda/4 wave plate 4-1-2 material is optical glass with caliber
The color separation prism 4-1-3 is formed by gluing 2 HK9L right-angle prisms, and the color separation film with 1.064 μm laser p-light reflection and s-light transmission is plated on the light separation surface, and the size is 40mm multiplied by 32mm multiplied by 6 mm; HK9L as narrow-band filter 4-3-1 material, 1.064 μm narrow-band filter film with caliber
The laser convergence component 4-3-2 consists of 2 HK9L lenses, the surface shapes are all spherical, and the caliber is
The laser 4-2 is YAG solid laser, and generates 1.064 μm pulsePunching laser; the laser receiver 4-3-3 is an avalanche diode.
Incident light reaches the spectral light splitting assembly 3 through the wide-spectrum shared transmission telescope assembly 1 and the plane reflector 2-1 of the FSM assembly 2, enters the thermal image relay assembly 7 through the transmission of the first light splitting lens 3-1, and finally reaches the infrared detector assembly 8; reflected by the first beam splitter 3-1 and enters the second beam splitter 3-2; then reflected by a second beam splitter 3-2 to reach a laser component 4; the light is transmitted by the second spectroscope 3-2 and then enters the TV relay assembly 5 and finally reaches the CCD assembly 6.
As shown in FIG. 2, the thermal image has a working spectrum range of 3.7-4.8 μm, a large field of view of 3 degrees multiplied by 2.3 degrees, a small field of view of 0.7 degrees multiplied by 0.53 degrees, a system F number of 5.5, an image height of 12mm, and zoom groups of 7-3-1 and 7-3-2 are driven in and out to realize the switching of the large field of view and the small field of view. The structural parameters of the components of the optical system are shown in Table 1.
TABLE 1
As shown in FIG. 3, the laser ranging spectrum is 1.064 μm, the F number of the system is 1.2, the image height is 0.06mm, and the structural parameters of the components of the optical system are shown in Table 2.
TABLE 2
As shown in figure 4, the working spectral range of the television is 0.6-0.8 μm, the large view field is 3 degrees multiplied by 2.3 degrees, the small view field is 0.7 degrees multiplied by 0.53 degrees, the F number of the system is 6, the image height is 7.04mm, and the zoom groups 5-3-1 and 5-3-2 are driven in and out to realize the switching of the large view field and the small view field. The structural parameters of the components of the optical system are shown in Table 3.
TABLE 3
Claims (7)
1. A dual field of view transmission formula multisensor single aperture optical system which characterized in that: the system comprises a wide spectrum shared transmission telescope component (1), an FSM component (2), a spectrum light splitting component (3), a laser component (4), a television relay component (5), a CCD component (6), a thermal image relay component (7) and an infrared detector component (8);
the wide-spectrum shared transmission telescope assembly (1) consists of a wide-spectrum objective lens group (1-1), a refraction plane reflector (1-2) and a wide-spectrum eyepiece lens group (1-3);
the materials of the wide-spectrum objective lens group (1-1) and the wide-spectrum eyepiece lens group (1-3) are obtained by the following processes:
in BaF2、CaF2、MgAl2O4、MgF2In sapphire, ZnS and ZnSe materials, according to the Abbe number V of the material at the television waveband of 0.6-0.8 mu m and the medium-wave infrared waveband of 3.7-4.8 mu m, a formula is utilized
Carrying out pairing combination; wherein epsilon1Is the primary color difference dispersion radius;
the characteristic parameters of the optical system are fixed values; v is the alpha times of the optical materials, A, B are respectively 2 optical materials which are matched, 1 and 3 respectively correspond to a television wave band and a medium wave infrared wave band;
the wide-spectrum objective lens group (1-1) is composed of multispectral ZnS and single crystal CaF2And 3 single crystal sapphire lenses, wherein the surface shapes are spherical and the calibers
The refraction plane reflector (1-2) is arranged at 84.2mm behind the wide-spectrum objective lens group (1-1) and is obliquely arranged at an included angle of 45 degrees with the optical axis, the material is optical quartz glass, and the external dimension is 125mm multiplied by 96mm multiplied by 10 mm; the wide spectrum eyepiece group (1-3) is arranged at 80mm behind the folding plane reflector (1-2) and consists of multispectral ZnS and single crystal BaF2And chemical vapor deposition ZnSe3 sheet lens, the surface shape is spherical, and the caliber is
The wide-spectrum objective lens group (1-1), the refraction plane reflector (1-2) and the wide-spectrum eyepiece lens group (1-3) form a Galilean telescope without a real focus, and the multiplying power gamma is 3.4;
in the wide-spectrum objective lens group (1-1), the multispectral ZnS lens has the front surface curvature radius of 344.996mm, the rear surface curvature radius of 1370.052mm and the lens thickness of 14 mm; single crystal CaF2The radius of curvature of the front surface of the lens is 216.577mm, the radius of curvature of the rear surface is 652.266mm, and the thickness of the lens is 18 mm; the curvature radius of the front surface of the single crystal sapphire lens is 430mm, the curvature radius of the rear surface of the single crystal sapphire lens is 261.8mm, and the thickness of the single crystal sapphire lens is 7 mm;
in the wide-spectrum eyepiece group (1-3), the curvature radius of the front surface of the multispectral ZnS lens is 590.439mm, the curvature radius of the rear surface of the multispectral ZnS lens is 291.047mm, and the thickness of the lens is 8 mm; single crystal BaF2The radius of curvature of the front surface of the lens is 42.591mm, the radius of curvature of the rear surface is 558.188mm, and the thickness of the lens is 15 mm; the curvature radius of the front surface of the ZnSe lens is 5965.75mm, the curvature radius of the rear surface is 62.5mm, and the thickness of the lens is 6mm by chemical vapor deposition;
the wide spectrum shared transmission telescope component (1) has aberration balance in three spectral bands of medium wave infrared of 3.7-4.8 mu m, visible light of 0.6-0.8 mu m and laser of 1.064 mu m;
the FSM component (2) consists of a plane mirror (2-1) and a driver (2-2);
the spectrum light splitting component (3) consists of a first color splitting plate (3-1) and a second color splitting plate (3-2);
the laser component (4) consists of a laser shared component (4-1), a laser (4-2) and a laser receiving component (4-3);
incident light reaches the spectral light splitting assembly (3) through the wide-spectrum shared transmission telescope assembly (1) and the plane reflector (2-1) of the FSM assembly (2), is transmitted into the thermal image relay assembly (7) through the first color separation panel (3-1), and finally reaches the infrared detector assembly (8); the light reflected by the first color separation plate (3-1) enters the second color separation plate (3-2); the light reflected by the second dichroic plate (3-2) reaches the laser assembly (4); the light transmitted through the second dichroic plate (3-2) enters the television relay assembly (5) and finally reaches the CCD assembly (6).
2. The dual field of view transmissive multi-sensor single aperture optical system of claim 1, wherein: the plane reflector (2-1) is arranged at 42mm of the rear end of the wide spectrum ocular lens group (1-3) and is obliquely arranged at an included angle of 45 degrees with the optical axis, the material is optical quartz glass, and the external dimension is 56mm multiplied by 45mm multiplied by 6 mm.
3. The dual field of view transmissive multi-sensor single aperture optical system of claim 1, wherein: the driver (2-2) adopts a piezoelectric ceramic driving device to drive the plane mirror (2-1) to quickly deflect to realize FSM secondary stability, and the compensation frame is combined with a primary stable residual error.
4. The dual field of view transmissive multi-sensor single aperture optical system of claim 1, wherein: the first color separation flat plate (3-1) is arranged at the position 80mm away from the rear end of the plane reflector (2-1) and is obliquely arranged at an angle of 45 degrees with the optical axis, the material is single crystal sapphire, and the external dimension is 62mm multiplied by 48mm multiplied by 5 mm; the incident surface of the first color separation flat plate (3-1) is plated with a color separation film which transmits 3.7-4.8 mu m medium wave infrared and reflects 0.6-0.8 mu m visible light and 1.064 mu m laser; the outgoing surface of the first color separation flat plate (3-1) is plated with a medium wave infrared antireflection film with the thickness of 3.7-4.8 mu m; the second color separation plate (3-2) is arranged in the reflection direction of the first color separation plate (3-1), is arranged in parallel with the first color separation plate (3-1) at a distance of 75mm, is made of HK9L optical glass and has the external dimension of 62mm multiplied by 44mm multiplied by 6 mm; the incident surface of the second dichroic flat plate (3-2) is plated with a dichroic film which transmits visible light of 0.6-0.8 mu m and reflects laser of 1.064 mu m; the exit surface of the second dichroic flat plate (3-2) is plated with a visible light antireflection film with the thickness of 0.6-0.8 μm.
5. The dual field of view transmissive multi-sensor single aperture optical system of claim 1, wherein: the laser shared component (4-1) consists of a laser relay component (4-1-1), a lambda/4 wave plate (4-1-2) and a dichroic prism (4-1-3); the laser receiving component (4-3) consists of a narrow-band optical filter (4-3-1), a laser converging component (4-3-2) and a laser receiver (4-3-3); the laser relay assembly (4-1-1) consists of 4 HK9L lenses, the surface shapes are all spherical, and the caliber is
The material of the lambda/4 wave plate (4-1-2) is optical glass with the caliber
The color separation prism (4-1-3) is formed by gluing 2 HK9L right-angle prisms, and the color separation film with the size of 40mm multiplied by 32mm multiplied by 6mm for p-light reflection and s-light transmission of 1.064 mu m laser is plated on the light separation surface; the narrow-band filter (4-3-1) is made of HK9L, and is plated with a 1.064 μm narrow-band filter film with a caliber of
The laser convergence component (4-3-2) consists of 2 HK9L lenses, the surface shapes are all spherical, and the caliber is
The laser (4-2) is a YAG solid laser and generates pulse laser of 1.064 mu m; the laser receiver (4-3-3) is an avalanche diode.
6. The dual field of view transmissive multi-sensor single aperture optical system of claim 1, wherein: the working spectral range of the thermal image is 3.7-4.8 microns, the large view field is 3 degrees multiplied by 2.3 degrees, the small view field is 0.7 degrees multiplied by 0.53 degrees, the F number of the system is 5.5, the image height is 12mm, and the large view field and the small view field of the thermal image are switched by driving the variable-power group into the thermal image relay assembly.
7. The dual field of view transmissive multi-sensor single aperture optical system of claim 1, wherein: the working spectral range of the television is 0.6-0.8 μm, the large view field is 3 degrees multiplied by 2.3 degrees, the small view field is 0.7 degrees multiplied by 0.53 degrees, the F number of the system is 6, the image height is 7.04mm, and the switching of the large view field and the small view field of the television is realized by driving in and out the zoom group in the television relay assembly.
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| CN112518423B (en) * | 2020-12-24 | 2022-07-19 | 华中科技大学 | Synchronous measuring device for deformation field and temperature field of orthogonal cutting process |
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