CN115508992A - Off-axis three-mirror optical system compensator and design method thereof - Google Patents
Off-axis three-mirror optical system compensator and design method thereof Download PDFInfo
- Publication number
- CN115508992A CN115508992A CN202211112889.3A CN202211112889A CN115508992A CN 115508992 A CN115508992 A CN 115508992A CN 202211112889 A CN202211112889 A CN 202211112889A CN 115508992 A CN115508992 A CN 115508992A
- Authority
- CN
- China
- Prior art keywords
- compensator
- mirror
- axis
- optical
- optical system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
- G02B17/06—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror
- G02B17/0626—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror using three curved mirrors
- G02B17/0642—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror using three curved mirrors off-axis or unobscured systems in which not all of the mirrors share a common axis of rotational symmetry, e.g. at least one of the mirrors is warped, tilted or decentered with respect to the other elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0012—Optical design, e.g. procedures, algorithms, optimisation routines
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Instruments For Measurement Of Length By Optical Means (AREA)
Abstract
The invention discloses an off-axis three-mirror optical system compensator and a design method thereof, which are characterized in that an optical flat plate with a certain thickness is inserted in front of the focus of an interferometer of an off-axis three-mirror auto-collimation interference light path to be used as the compensator for compensating the aberration of rear light path elements such as a window, an optical filter and the like. Under the constraint of an off-axis three-mirror design light path, a plurality of light path configurations are established to optimize the auto-collimation interference light path model with the compensator, so that the optimal optical flat thickness is obtained. The material of the optical flat compensator is selected according to the working waveband of the interferometer and is subjected to optical coating treatment. The method is simple and clear, can greatly reduce the deviation of the off-axis three-mirror optical system debugging test, improves the efficiency and the accuracy of the off-axis three-mirror auto-collimation interference test, and is particularly suitable for the debugging test of the off-axis three-mirror optical system of flat plate elements such as a window sheet, a light filter sheet and the like on rear light paths of a medium-wave infrared or long-wave infrared off-axis three-mirror optical system and the like.
Description
Technical Field
The invention belongs to the field of optical design or optical detection, and relates to a compensator structure and a design method applied to debugging and testing of an off-axis three-mirror optical system.
Background
As a total reflection optical system, the off-axis three-reflector optical system has the advantages of wide working wave band and no chromatic aberration, simultaneously avoids the defect of central light blocking, and can realize the clear aperture of 1-2 m magnitude. The three reflectors not only have enough design variables, but also can be designed in a light weight mode, and on the premise that the resolution and the imaging quality are guaranteed, the field angle of about 20 degrees can be achieved, so that the three reflectors are widely applied.
For example, a Mars remote sensing satellite developed in China-Tian Yi, a high-resolution remote sensing camera of the Mars remote sensing satellite adopts an off-axis three-mirror optical system, the focal length is 4640mm, the clear aperture is 387mm, and the field angle is 2 degrees.
The off-axis three-mirror optical system is generally measured by auto-collimation interferometry, and the assembling and testing light path mainly comprises the off-axis three-mirror system, a plane reflector and an interferometer. In the auto-collimation interference light path, the focus of the interferometer is positioned on the focal plane of the off-axis three-mirror system, the optical wavefront emitted by the interferometer is converted into a plane wave through the off-axis three-mirror system to be emitted, and the plane wave is collimated by the plane mirror to return, passes through the optical system again and then converges at the focus of the optical system.
And the detection wavefront emitted by the interferometer carries the wave aberration information of the measured off-axis three-mirror optical system back to the interferometer, and the interferometer measures the system wave aberration of the corresponding field under the current state. According to the result of the auto-collimation interference measurement, a misalignment solving model can be established through methods such as computer-aided adjustment and sensitivity analysis, and the reflector of the measured off-axis optical system is finely adjusted to obtain a preset optical path state.
The large-view-field off-axis three-reflector optical system is used as a front optical system and is connected with planar optical elements such as a window sheet, an optical filter and a color separation sheet, so that the functions of high-resolution imaging or multi-channel or multi-spectral imaging and the like can be realized. Although the optical flat plate is an afocal element and does not affect the optical power of the optical system, the parallel flat plate is not an ideal optical element and cannot form perfect images.
In particular, when the optical plate is located in a converging optical path, the effect on the overall aberration is more pronounced, especially for large relative aperture large field optical paths. Therefore, in the off-axis three-mirror optical design stage, the effect of the thickness of the parallel plate on the aberration must be considered. In the optical design stage, optical elements such as a window plate, an optical filter, a color separation plate, a beam splitter and the like of the optical path behind the off-axis three-mirror system are taken into consideration to jointly form a set of perfect imaging optical path.
After the off-axis three-mirror optical system is processed, only after the three single mirrors and the system optical path are fully tested and meet the preset index, the next step of work can be carried out, and the whole machine integration and test of the photoelectric remote sensing system can be participated.
However, in the auto-collimation interferometry optical path of the off-axis three-mirror optical system, if the position postures of the three reflectors are not constrained, the optical path integrated by the three reflectors only faces to the direction of minimizing the wave aberration, so that the local minimum is caused, the image quality requirement of the full field of view is difficult to meet, and the optical path state deviates from the preset designed optical path state.
If the functions of optical flat plates such as a window of a rear light path, an optical filter and the like are not considered in the adjustment test of the off-axis three-mirror optical system, the wavefront design residual error of the optical system consisting of the three reflectors is increased. When the auto-collimation interference light path is used for adjustment, the residual aberration of the off-axis three-mirror system is mixed with the wavefront difference caused by the position error of the reflector, so that the residual aberration and the wavefront difference are difficult to distinguish and separate, and great difficulty is brought to the adjustment of the optical system.
The window, the optical filter and the like of the rear light path of the off-axis three-mirror optical system in the visible light wave band can generally penetrate through the working wave band of the interferometer, so that in the off-axis three-mirror auto-collimation testing and adjusting light path in the visible light wave band, the optical flat sheet with the same glass material and the same thickness is used as a compensator, and the state consistency of the off-axis three-mirror auto-collimation adjusting testing light path and the designed light path can be naturally realized.
However, in the off-axis three-mirror optical system operating in the short-wave near infrared, the medium-wave infrared and the long-wave infrared bands, optical materials such as monocrystalline Silicon (Silicon), monocrystalline Germanium (Germanium) and Zinc Selenide (Zinc Selenide) are generally adopted in the rear optical path, most of the materials cannot pass through the operating band of the laser interferometer, and particularly after the coating treatment is performed on the operating band, the operating wavelength of the laser interferometer is more difficult to pass through.
The refractive index of the infrared band optical material is large and cannot be ignored even if the thickness is small, and the influence of the windows on aberration correction needs to be considered in the design process of the optical system. Therefore, when the off-axis three-mirror optical system of the medium-long wave infrared band is adjusted and tested, the influence of optical elements such as an infrared window, an optical filter and the like needs to be considered, and the light path state close to or consistent with that of the actually needed system can be obtained.
By using the conception of the compensator design and zero compensation inspection of aspheric surface detection, particularly aiming at the assembly and debugging test of a medium-wave infrared or long-wave infrared off-axis three-reflector optical system and a flat-plate element off-axis three-reflector optical system with a window sheet, a color separation sheet and the like on a rear light path, an optical compensator is required to be designed for an off-axis three-reflector auto-collimation interference light path.
In the auto-collimation interference measurement light path, an optical compensator is used for replacing an optical flat element of a rear light path, and residual aberration of an off-axis three-reflection auto-collimation light path is compensated, so that the problem of assembly and adjustment testing of optical systems with window filters and the like in the rear light path is solved, and the state that the off-axis three-reflection measurement and assembly and adjustment light path is closest to the light path of an original system is obtained.
The existing research results are two, and Li Zhaoyang et al reported an off-axis three-reflector optical system compensator structure in the optical science report of 2021, and a group of lenses are additionally arranged on an off-axis three-reflector rear light path to be used as a compensator for system adjustment test. However, in simulation analysis, the method has certain defects in design, the constraint of the original optical path state is not considered, and the method is not related to the original system in the design process of the front off-axis three-mirror optical system compensator, so that the consistent optical path state is difficult to obtain.
The Leming and the like of Changchun optical precision machinery and physical research institute of China academy of sciences adopt a calculation holographic compensator to compensate a middle real image surface of a Rug type off-axis three-mirror optical system, and the calculation holographic compensator is used for adjusting a primary mirror and a secondary mirror of the off-axis three-mirror optical system. The CGH compensator is difficult to design and manufacture, the machining precision requirement is high, and the method has the advantages of simple design and simplicity in implementation.
Different from the prior art and the method reported by the literature, the invention takes the designed off-axis three-mirror optical system as the constraint to optimally design the compensator of the off-axis three-mirror auto-collimation optical path, not only compensates the aberration of the auto-collimation interference optical path, but also replaces the optical element of the rear optical path, thereby obtaining the optimal compensator design, and the optical state can be close to the design value only by carrying out the auto-collimation adjustment test of the off-axis three-mirror optical system according to the optimal compensator.
Compared with the existing method, the compensator structure and the design method provided by the invention carry out self-collimation interference assembly and test on the off-axis three-mirror optical system, minimize the influence on the optical path state and obtain the closest design value of the optical path state.
Disclosure of Invention
According to the application background of the off-axis three-mirror optical system assembling test, a compensator structure of the off-axis three-mirror optical system assembling test is provided.
The main content of the invention is as follows: and adding an optical flat sheet with a certain thickness as a compensator for adjusting the off-axis three-mirror optical system after the interferometer focus of the off-axis three-mirror optical system auto-collimation interference measurement light path.
Light rays emitted by the interferometer are diffused through the focus 1, pass through the compensator 2, sequentially pass through the three mirror 3, the secondary mirror 4, the primary mirror 5 and the incident auto-collimation plane mirror 6; then the light rays return from the plane mirror 6 in the original path, sequentially pass through the primary mirror 5, the secondary mirror 4 and the third mirror 3, pass through the compensator 2 again, and finally converge to the interferometer focus 1 to form an off-axis three-reflection auto-collimation interference light path with the compensator.
The number of the optical flat plates 2 is one or more, and the materials are selected according to the working waveband of the interferometer and are subjected to optical coating treatment.
The method for calculating the thickness of the optical flat plate 2 comprises the following steps:
1) In optical design software, a configuration I is established, a light path model is an original system of an off-axis three-mirror optical system and comprises an off-axis three-mirror optical system, a window, an optical filter and a color separation sheet optical element, and all parameters are kept unchanged, namely the configuration I has no design variable and plays a role in restriction;
2) Establishing a configuration II, wherein an optical path model is an off-axis three-mirror optical system and a compensator, the thickness of the compensator 2, the distance from the compensator 2 to a focal point 1 of the interferometer and the distance from the compensator 2 to the top point of the three mirrors 3 are used as design variables of the configuration II;
3) Establishing a configuration III, wherein a light path model is an off-axis three-mirror optical system and a compensator, the thickness of the compensator 2 is the same as the corresponding parameter of the configuration II, and meanwhile, two interval parameters of a reflector, the distance from the compensator 2 to a focus 1 of the interferometer and the distance from the compensator 2 to the vertex of a three-mirror 3 are used as design variables of the configuration III;
4) Establishing a configuration IV, wherein an original system of the off-axis three-mirror optical system comprises original elements such as a window, an optical filter, a color separation sheet and the like, two interval parameters of a reflector are the same as two corresponding parameters of the configuration III, and only a back intercept is taken as a design variable of the configuration IV;
5) And simultaneously optimizing various design variables of the configurations I, II, III and IV by minimizing the wave aberration, so that the optimal optical compensator thickness and reflection position parameters can be obtained.
The invention has the following technical effects:
(a) The compensator is an optical flat sheet with small aperture, has small clear aperture and can be made into a conventional size of about 25 mm-50 mm, the compensator self-forming module installed by utilizing the existing optical clamping instrument can independently complete assembly and then is integrated with a self-collimation interference optical path, the compensation structure is simple, and the installation, adjustment and test of an off-axis three-mirror system are facilitated.
(b) The system compensator is close to the focus of the interferometer, is insensitive to thickness and angle errors and installation distance errors, and can meet the requirement of system installation and adjustment tests only by properly controlling the thickness error of the compensator, so the compensator has extremely low processing and testing difficulty.
(c) The compensation effect is obvious, the method is particularly suitable for the assembly and debugging test of the medium-wave infrared or long-wave infrared off-axis three-mirror optical system and the off-axis three-mirror optical system of the flat-plate element with the window sheet, the color separation sheet and the like on the rear light path, and the defects of the existing method are overcome.
Drawings
FIG. 1 is a schematic diagram of an off-axis three-mirror optical system autocollimation interferometry system with a compensator.
FIG. 2 is a diagram of a long-wave infrared off-axis three-mirror optical system with windows and filters. .
FIG. 3 is a long-wave infrared off-axis three-mirror optical system tuned with a compensator.
Detailed Description
The invention provides a compensator structure for an adjustment test of an off-axis three-mirror optical system, which is characterized in that an optical flat sheet with proper thickness is placed in front of a focus of an interferometer in an auto-collimation interference light path consisting of the interferometer and a tested off-axis three-mirror optical system, so that equivalent substitution and aberration compensation of parallel flat optical elements of an off-axis three-mirror rear light path are realized.
The design of the thickness of the optical slab compensator is a key step in the design of the compensator, and is also the subject of claim (5).
The specific implementation steps of the thickness design of the optical flat plate compensator are as follows:
establishing a configuration I in optical design software, wherein a light path model is an original system of an off-axis three-reflector optical system and comprises an off-axis three-reflector optical system and optical elements such as a window, an optical filter, a dichroic filter and the like, and all parameters are kept unchanged, namely the configuration I has no design variable;
step (b), establishing a configuration II, wherein an optical path model is an off-axis three-mirror optical system and a compensator, the thickness of the compensator 2, the distance from the compensator 2 to a focal point 1 of the interferometer and the distance from the compensator 2 to the vertex of the three mirrors (3), and three parameters are used as design variables of the configuration II;
step (c), establishing a configuration III, wherein a light path model is an off-axis three-mirror optical system and a compensator, the thickness of the compensator 2 is the same as the corresponding parameter of the configuration II, and meanwhile, two interval parameters of a reflector, the distance from the compensator 2 to a focal point 1 of the interferometer and the distance from the compensator 2 to the top point of a three-mirror 3 are used as design variables of the configuration III;
establishing an original system of an off-axis three-mirror optical system with configuration IV, wherein the original system comprises elements such as a window, an optical filter, a color separation sheet and the like, two interval parameters of a reflector are the same as two corresponding parameters of configuration III, and only a back intercept is used as a design variable of configuration IV;
and (e) minimizing the wave aberration, and simultaneously optimizing the design variables of the configurations I, II, III and IV to obtain the optimal optical compensator thickness and reflection position parameters.
And optimizing to obtain the optimal parameters of the thickness, the clear aperture and the like of the compensator according to the steps, selecting a proper glass material and coating according to the working waveband of the interferometer, and installing the glass material and the coating at a proper position of the focus of the interferometer of the off-axis three-mirror auto-collimation light path.
The key step of the design of the thickness of the optical flat compensator is to establish the reference and constraint relation between a designed optical system and an adjustment and test off-axis three-mirror optical system by utilizing the multiple configuration function of optical design software, and optimize the compensator parameters of an adjustment and test optical path under the constraint of the designed optical system to realize the optimal design of the compensator.
The invention is further illustrated by the following examples in conjunction with the drawings, wherein the parameters of the design of the example optical system are as follows:
effective pore size: 200.0mm;
the field angle: 12.0 degrees;
focal length: 400.0mm;
working wave band: 8.0-10.0 μm.
The window is single crystal Germanium (Germanium) with a thickness of 8.0mm, and the filter adopts single mirror Germanium (Germanium) with a thickness of 1.0 mm. Initial design parameters of the optical system were as follows:
and based on the initial optical path parameters, obtaining the required optical system through proper optimization and combination of proper constraint conditions.
According to the final optical design model, the optical compensator is modeled, and the total number of the four configuration states
The original optical design was configured (I) without optimization variables.
Three mirrors and a compensator are configured (II). The optical compensator adopts quartz (Silica), wherein the distance from the three mirrors to the compensator, the distance from the compensator to the interferometer and the thickness of the compensator are set as optimization variables.
And (III) configuring three mirrors and a compensator, wherein the thickness of the compensator is equal to the corresponding parameter of the configuration (II), wherein two spacing parameters of the three mirrors, the distance from the compensator to the focal point of the interferometer, and the distance from the compensator to the vertex of the three mirrors are set as optimization variables.
And (IV) configuring the original optical design, wherein two interval parameters of the three reflectors are equal to the corresponding parameters of the configuration (III), and the rear intercept is set as an optimization variable. The other parameters are the same as configuration (I), and remain unchanged.
The respective design variables of configurations I, II, III and IV were optimized simultaneously with minimization of the wave aberration, resulting in an optimal optical plate compensator thickness of 3.79mm. The compensator adjusts the auto-collimation light path, and the interval variation of three reflectors of the off-axis optical system is only 0.25mm and 0.09mm.
And (3) adjusting the three reflectors by using a quartz optical flat plate compensator with the thickness of 3.79mm, and obtaining that the state of the optical system is consistent with the design value. At the moment, the off-axis three-mirror state is substituted into the original system light path again, and the imaging quality parameters such as the diffuse spot and the optical transfer function are consistent with the original system light path.
The autocollimation light path is adjusted without a compensator, the variation of the spacing of three reflectors of the off-axis optical system is 2.77mm and 1.37mm, the corresponding variation of the rear intercept is 34.88mm,
the above examples have been verified by practical assembly tests to demonstrate the accuracy and feasibility of the compensator structure and design method of the present invention, wherein the compensator can be fixed in front of the interferometer focus using a lens clamp, a two-dimensional linear sliding platform, or other shelf products.
In summary, the present invention provides a structure and a design method of an off-axis three-mirror optical system compensator, wherein an optical compensator is added to a focal point of an interferometer on the basis of an off-axis three-mirror auto-collimation interferometry measurement optical path, which can not only replace the optical path difference of optical elements such as a window filter of a rear optical path, but also compensate the aberration of the optical elements of the rear optical path, so that the adjustment test of the off-axis three-mirror optical system can be smoothly performed, and a state closest to a predetermined optical path can be obtained.
The design method of the compensator can be further popularized, can be used for designing the compensator of the auto-collimation light path of the off-axis three-reflector optical system with the lens group in the rear light path, is used for assembly and adjustment test, and has wider applicability.
The invention is not to be considered as limited to the details of the foregoing description, but is to be construed as broadly as the invention can be embodied in the form of various modifications, equivalents and improvements within the spirit and scope of the invention.
Claims (3)
1. An off-axis three-mirror optical system compensator is characterized in that,
an optical flat plate (2) with a certain thickness is inserted in front of the interferometer focus of the auto-collimation interference light path of the off-axis three-mirror optical system to be used as a compensator;
light rays emitted by the interferometer are diffused by the focus (1), pass through the compensator (2), sequentially pass through the three mirrors (3), the secondary mirror (4), the primary mirror (5) and the incident auto-collimation plane mirror (6); then the light rays return from the original path of the plane mirror (6), sequentially pass through the primary mirror (5), the secondary mirror (4) and the third mirror (3), pass through the compensator (2) again, and finally converge to the focal point (1) of the interferometer to form an off-axis three-mirror auto-collimation interference light path with the compensator.
2. An off-axis three-mirror optical system compensator according to claim 1 wherein the number of optical plates (2) is one or more, and the materials are selected according to the operating band of the interferometer and optically coated.
3. An off-axis three-mirror optical system compensator according to claim 1 wherein the thickness of the optical flat plate (2) is calculated by the steps of:
1) In optical design software, a configuration I is established, a light path model is an original system of an off-axis three-mirror optical system and comprises an off-axis three-mirror optical system, a window, an optical filter and a color separation sheet optical element, and all parameters are kept unchanged, namely the configuration I has no design variable and plays a role in restriction;
2) Establishing a configuration II, wherein an optical path model is an off-axis three-mirror optical system and a compensator, the thickness of the compensator (2), the distance from the compensator (2) to a focal point (1) of the interferometer and the distance from the compensator (2) to the top point of the three mirrors (3) are used as design variables of the configuration II;
3) Establishing a configuration III, wherein the light path model is an off-axis three-mirror optical system and a compensator, the thickness of the compensator (2) is the same as the corresponding parameter of the configuration II, and meanwhile, two interval parameters of the mirrors, the distance from the compensator (2) to a focal point (1) of the interferometer and the distance from the compensator (2) to the vertex of the three mirrors (3) are used as design variables of the configuration III;
4) Establishing a configuration IV, wherein an original system of the off-axis three-mirror optical system comprises original elements such as a window, an optical filter, a color separation sheet and the like, two interval parameters of a reflector are the same as two corresponding parameters of the configuration III, and only a back intercept is taken as a design variable of the configuration IV;
5) And simultaneously optimizing the design variables of the configurations I, II, III and IV by minimizing the wave aberration to obtain the optimal optical compensator thickness and reflection position parameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211112889.3A CN115508992A (en) | 2022-09-14 | 2022-09-14 | Off-axis three-mirror optical system compensator and design method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211112889.3A CN115508992A (en) | 2022-09-14 | 2022-09-14 | Off-axis three-mirror optical system compensator and design method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115508992A true CN115508992A (en) | 2022-12-23 |
Family
ID=84504451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211112889.3A Pending CN115508992A (en) | 2022-09-14 | 2022-09-14 | Off-axis three-mirror optical system compensator and design method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115508992A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116699864A (en) * | 2023-07-31 | 2023-09-05 | 中国科学院长春光学精密机械与物理研究所 | Reference-free adjustment method, device, equipment and medium for space-based large optical system |
-
2022
- 2022-09-14 CN CN202211112889.3A patent/CN115508992A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116699864A (en) * | 2023-07-31 | 2023-09-05 | 中国科学院长春光学精密机械与物理研究所 | Reference-free adjustment method, device, equipment and medium for space-based large optical system |
| CN116699864B (en) * | 2023-07-31 | 2023-10-20 | 中国科学院长春光学精密机械与物理研究所 | Reference-free adjustment method, device, equipment and medium for space-based large optical system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110567393B (en) | Large-curvature-radius free-form surface mirror surface shape interference measurement device and method | |
| CN107782254B (en) | A kind of mixed compensating mode sub-aperture stitching surface testing method | |
| CN111077076B (en) | Medium wave infrared Fourier transform imaging spectrometer athermal secondary imaging system | |
| CN104697464B (en) | The interference detection method of large-caliber convex aspheric surface speculum based on offset lens | |
| CN110737103B (en) | Large-caliber off-axis catadioptric multichannel optical system assembling and adjusting method | |
| CN218974671U (en) | Off-axis three-reflector optical system compensator | |
| CN102419251A (en) | Ultraviolet image intensifier resolution testing device | |
| Laurent et al. | MUSE Integral Field Unit: Test results on the first out of 24 | |
| Burge et al. | Measurement of aspheric mirror segments using Fizeau interferometry with CGH correction | |
| CN115508992A (en) | Off-axis three-mirror optical system compensator and design method thereof | |
| CN109253864A (en) | It is a kind of for examining the optical system of super large caliber convex hyperboloid mirror | |
| CN111006851B (en) | Wavefront detection device and method for edge sub-mirror in splicing mirror | |
| CN110579887B (en) | Catadioptric common-aperture system centering assembly and adjustment method containing relay lens group | |
| Mourard et al. | CHARA/SPICA: a six-telescope visible instrument for the CHARA Array | |
| CN113739719B (en) | Surface shape detection system and method of high-precision Schmidt correction plate | |
| CN103293697B (en) | Large-visual-field off-axis prime focus type collimator optical system | |
| CN114894099A (en) | Large-range high-precision echelle grating mechanical splicing displacement detection system and method | |
| CN111190286B (en) | Optical system for checking concave aspheric mirror by combining front-back zero compensation and design method | |
| Olivier et al. | Optical design of the LSST camera | |
| CN112748558A (en) | Wide-spectrum large-dynamic-range optical system and test calibration method | |
| CN209446259U (en) | For examining the optical system of super large caliber convex hyperboloid mirror | |
| CN116224616A (en) | Imperfect imaging off-axis three-reflection optical path compensator and design method thereof | |
| Yasui et al. | Warm infrared Echelle spectrograph (WINERED): testing of optical components and performance evaluation of the optical system | |
| Briguglio et al. | The simulator of the VLT Deformable Secondary Mirror: a test tool for adaptive optics instruments for the Yepun-UT4 Telescope | |
| Kilaru et al. | Development of multi-beam long trace profiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |