CN104297916A - Method for expanding focal length of large-diameter refraction and reflection zoom system - Google Patents
Method for expanding focal length of large-diameter refraction and reflection zoom system Download PDFInfo
- Publication number
- CN104297916A CN104297916A CN201410610318.1A CN201410610318A CN104297916A CN 104297916 A CN104297916 A CN 104297916A CN 201410610318 A CN201410610318 A CN 201410610318A CN 104297916 A CN104297916 A CN 104297916A
- Authority
- CN
- China
- Prior art keywords
- focal length
- pancreatic
- zoom
- catadioptric
- expansion
- 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
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention relates to a method for expanding the focal length of a large-diameter refraction and reflection zoom system. A primary mirror system is replaced, a rear microscopic zooming imaging lens group is not changed, and accordingly the focal length of the large-diameter refraction and reflection zoom system is expanded. The entrance pupil diameter of the zoom system is increased by using a larger-diameter primary mirror, the focal length F of the zoom system remains unchanged after replacement, the size of a detector is unchanged, detectivity is improved, and the focal length of the large-diameter refraction and reflection zoom system is expanded.
Description
Technical field
The invention belongs to applied optics technical field, relate to long-focus, heavy caliber, catadioptric varifocal optical system, be specifically related to a kind of method of catadioptric zoom system, pancreatic system focal length expansion.
Background technology
Invent first telescope from Dutchman Han Silibaixi in 1608, over 400 years, telescope is constant trend from small-bore past heavy caliber development always.In numerous telescope, the telescope of heavy caliber catadioptric zoom system, pancreatic system composition is wherein a kind of.When manufacturing and designing the catadioptric zoom system, pancreatic system of different bore, the catadioptric zoom system, pancreatic system of different bore needs to carry out separately designing and processing.In order to improve the efficiency manufacturing catadioptric zoom system, pancreatic system, different bore catadioptric zoom system, pancreatic system common sparing optical module necessitates.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the catadioptric zoom system, pancreatic system design of existing a kind of bore (i.e. a kind of focal length section) and process a set of lighting apparatus component, there is no the deficiency of common components each other, a kind of heavy caliber catadioptric zoom system, pancreatic system focal length extended method is provided.
Technical solution of the present invention is: catadioptric zoom system, pancreatic system can regard two-mirror system (i.e. master lens system) and micro-zoom imaging system composition as.To the catadioptric zoom system, pancreatic system of different caliber series, share micro-zoom imaging system below, only replace master lens system (Cassegrain system, R-C system, Newtonian catadioptric system parfocal are positive mirror group) and the expansion of catadioptric zoom system, pancreatic system focal length can be realized.Concrete in the following way or mirror group carry out the expansion of system focal length, reach the entrance pupil bore of increase system, keeping system F number is constant, and detector size is constant, increases system looks ability:
1., the catadioptric zoom system, pancreatic system of different entrance pupil bores (as 400mm bore in specific embodiment and 600mm bore system) has identical F number;
2., the catadioptric zoom system, pancreatic system of different entrance pupil bores (as 400mm bore in specific embodiment and 600mm bore system) has identical maximum imaging surface size;
3., between the catadioptric zoom system, pancreatic system of different entrance pupil bores (as 400mm bore in specific embodiment and 600mm bore system) master lens system can be replaced mutually, can meet 1. and 2. after replacement;
4., the catadioptric zoom system, pancreatic system of different entrance pupil bores (as 400mm bore in specific embodiment and 600mm bore system) met 1., 2. and 3. has identical image quality.
Wherein, master lens system can be typical aplanasia two-mirror system (as 400mm bore in specific embodiment and 600mm bore system, their master lens system is aplanasia two-mirror system) etc., also can be Newtonian catadioptric system.
Principle of the present invention is:
Catadioptric zoom system, pancreatic system can regard two-mirror system as, i.e. master lens system and micro-zoom imaging system composition.To the catadioptric zoom system, pancreatic system of different caliber series, share micro-zoom imaging system below, only replace master lens system and can realize the expansion of catadioptric zoom system, pancreatic system focal length.Described master lens system can be typical aplanasia two-mirror system, also can be Newtonian system.The present invention utilizes the master lens system of different bore and the identical catadioptric zoom system, pancreatic system of the micro-zoom imaging system a series of different bore of composition, the catadioptric zoom system, pancreatic system focal range of often kind of bore is different, but F number is identical, and detector size is identical, so just reach the object of system focal length expansion.。The present invention, by replacing master lens system, shares varifocal imaging mirror group and reduces catadioptric zoom system, pancreatic system focal length expansion cost.
The present invention's advantage is compared with prior art:
(1) when the present invention has overturned traditional catadioptric zoom system, pancreatic system focal length expansion, the catadioptric zoom system, pancreatic system of a kind of bore designs and processes a set of lighting apparatus component, there is no common package between the catadioptric zoom system, pancreatic system of each bore, a kind of method having the catadioptric zoom system, pancreatic system focal length expansion of common components is provided.
(2) adopt the way of the catadioptric zoom system, pancreatic system common components of each bore, the finished product efficiency of catadioptric zoom system, pancreatic system can be improved.
(3) adopt the way of the catadioptric zoom system, pancreatic system common components of each bore, the cost of catadioptric zoom system, pancreatic system focal length expansion can be reduced.
(4) the present invention is equally applicable to the catadioptric zoom system, pancreatic system of Newtonian, has universality.
Accompanying drawing explanation
Fig. 1 is the catadioptric zoom system, pancreatic system of 400mm bore, comprises master lens system+micro-zoom imaging system; In figure, 1 is primary mirror, and 2 is secondary mirror, and 3 is cover glass, and 4 is catoptron, and 5 is image planes, and 6 is focusing lens group, and 7 is catoptron, and 8 is light modulation device, and 9 is varifocal imaging mirror group, and 10 is imaging target surface.
Fig. 2 is 400mm bore two-mirror system, and namely the first half of system in Fig. 1, also can be described as master lens system, replaceable part during focal length expansion.
Fig. 3 is micro-zoom imaging system in the catadioptric zoom system, pancreatic system of the 400mm bore latter half of system (namely in Fig. 1); I.e. 400mm bore and 600mm bore common components (varifocal imaging mirror group).
MTF (modulation passes letter) curve when Fig. 4 (a) is 400 millimeters of bore systems short burnt position;
MTF (modulation passes letter) curve when Fig. 4 (b) is 400 millimeters of bore system focal length positions;
Fig. 5 is the catadioptric zoom system, pancreatic system of 600mm bore;
MTF (modulation passes letter) curve when Fig. 6 (a) is 600 millimeters of catadioptric zoom system, pancreatic systems of bore short burnt position;
MTF (modulation passes letter) curve when Fig. 6 (b) is 600 millimeters of bores catadioptric zoom system, pancreatic system.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing and specific embodiment.
As shown in Fig. 1, Fig. 2, Fig. 3, catadioptric zoom system, pancreatic system can regard two-mirror system (i.e. master lens system) and micro-zoom imaging system composition as.
As shown in Figure 1; the catadioptric zoom system, pancreatic system of 400mm bore: light beam is by forming image planes after primary mirror 1, secondary mirror 2, cover glass 3, catoptron 4; be followed successively by focusing lens group 5, catoptron 6, light modulation device 7 after image planes, final beam is imaged on imaging target surface 9 by micro-zoom imaging lens group 8.
When carrying out the expansion of catadioptric zoom system, pancreatic system focal length, only need replace the catadioptric zoom system, pancreatic system first half shown in Fig. 2, the catadioptric zoom system, pancreatic system latter half shown in Fig. 3 is common package.As bore 400mm (focal length: 1000mm ~ 2000mm), 600mm (focal length: 1500mm ~ 3000mm) ... etc. catadioptric zoom system, pancreatic system, only the catadioptric zoom system, pancreatic system first half shown in Fig. 2 need be designed respectively and is processed as the two-mirror system of corresponding bore, combine with the common components shown in Fig. 3 again, bore 400mm (focal length: 1000mm ~ 2000mm) can be realized, 600mm (focal length: 1500mm ~ 3000mm) ... etc. the catadioptric zoom system, pancreatic system of different focal section, and the F number of the catadioptric zoom system, pancreatic system of each focal length section is identical, and detector size is identical.
Be described for 400mm bore and 600 millimeters of catadioptric zoom system, pancreatic systems of bore below.
Lens design index:
400 bore systems
● service band: visible ray
● focal range: 1000mm ~ 2000mm
●f/#：2.5～5
● pupil face size: entrance pupil is fixed as 400mm
● resemble face size: diagonal line 8mm
● optical transfer function: MTF >=0.4@60lp/mm
As shown in Figure 1, system is made up of two-mirror system and micro-zoom imaging system system diagram, and image quality as shown in Figure 4.
600 bore systems
● service band: visible ray
● focal range: 1500mm ~ 3000mm
●f/#：2.5～5
● pupil face size: entrance pupil is fixed as 600mm
● resemble face size: diagonal line 8mm
● optical transfer function: MTF >=0.4@60lp/mm
As shown in Figure 5, system is made up of two-mirror system and micro-zoom imaging system system diagram, and image quality as shown in Figure 6.
The common components of 400mm bore and 600 millimeters of catadioptric zoom system, pancreatic systems of bore is the varifocal imaging mirror group shown in Fig. 3.
Be the micro-zooming system of m and focal length for multiplying power be f
beforethe catadioptric zoom system, pancreatic system that combines of two-mirror system, its focal distance f is determined by following formula:
F=m × f
before, therefore with the micro-zoom imaging system of identical multiplying power m and the two-mirror system combination of different focal, namely may be combined with the catadioptric zoom system, pancreatic system of different focal scope, reach the object of focal length expansion.
Certainly in the specific implementation, two-mirror system and micro-zoom imaging system can combine disappearing image difference.The system without aberration of two-mirror system not necessarily stricti jurise, can have certain aberration, its emergent pupil and the entrance pupil of micro-zoom imaging system just in time mate.The aberration of two-mirror system is contrary with the aberration symbol of micro-zooming system, just in time complementary, thus the aberration of combined system is almost nil.
The not disclosed in detail part of the present invention belongs to the known technology of this area.
Although be described the illustrative embodiment of the present invention above; so that the technician of this technology neck understands the present invention; but should be clear; the invention is not restricted to the scope of embodiment; to those skilled in the art; as long as various change to limit and in the spirit and scope of the present invention determined, these changes are apparent, and all innovation and creation utilizing the present invention to conceive are all at the row of protection in appended claim.
Claims (3)
1. the method for the catadioptric zoom system, pancreatic system focal length expansion of heavy caliber, utilize and replace master lens system, micro-zoom imaging lens group is constant below, reach the expansion of catadioptric zoom system, pancreatic system focal length, it is characterized in that: carry out the expansion of system focal length in the following way, reach the entrance pupil bore of increase system, keeping system F number is constant, detector size is constant, increases system looks ability:
1., different entrance pupil bore there is identical F number catadioptric zoom system, pancreatic system between by replacing master lens system expansion focal length;
2., different entrance pupil bore there is identical maximum imaging surface size catadioptric zoom system, pancreatic system between by replacing master lens system expansion focal length;
3., between the catadioptric zoom system, pancreatic system of different entrance pupil bores expanding focal length by replacing master lens system (two-mirror system), F number can be met after replacement identical, maximum imaging surface measure-alike.
2. the method for catadioptric zoom system, pancreatic system focal length expansion according to claim 1, it is characterized in that: micro-zoom imaging lens group is constant below only to replace master lens system (i.e. two-mirror system), with regard to energy transformation system entrance pupil bore, system F number is constant, reaches catadioptric zoom system, pancreatic system detectivity and improves and the expansion of system focal length.
3. the method for catadioptric zoom system, pancreatic system focal length expansion according to claim 1, is characterized in that: master lens system is typical aplanasia two-mirror system, or Newtonian catadioptric system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410610318.1A CN104297916A (en) | 2014-11-02 | 2014-11-02 | Method for expanding focal length of large-diameter refraction and reflection zoom system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410610318.1A CN104297916A (en) | 2014-11-02 | 2014-11-02 | Method for expanding focal length of large-diameter refraction and reflection zoom system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104297916A true CN104297916A (en) | 2015-01-21 |
Family
ID=52317711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410610318.1A Pending CN104297916A (en) | 2014-11-02 | 2014-11-02 | Method for expanding focal length of large-diameter refraction and reflection zoom system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104297916A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643592A (en) * | 2017-10-27 | 2018-01-30 | 上海理工大学 | A kind of varifocal catadioptric optical system of long-focus |
| CN107942480A (en) * | 2017-12-14 | 2018-04-20 | 中国科学院光电技术研究所 | A kind of catadioptric mixing infrared optical imaging system of new zoom ratio |
| CN108873229A (en) * | 2018-06-27 | 2018-11-23 | 湖北华中光电科技有限公司 | A kind of double smart tracking lens of focusing |
| CN109581646A (en) * | 2019-01-25 | 2019-04-05 | 中国科学院云南天文台 | A kind of Multifunction astronomical observation device and control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010017732A1 (en) * | 1999-12-15 | 2001-08-30 | Takeshi Akiyama | Optical system and optical apparatus having the same |
| CN101655391A (en) * | 2009-08-28 | 2010-02-24 | 中国科学院光电技术研究所 | Improved day star detecting device |
| CN103472581A (en) * | 2013-09-11 | 2013-12-25 | 中国科学院光电技术研究所 | Method for serialization of catadioptric zoom system |
-
2014
- 2014-11-02 CN CN201410610318.1A patent/CN104297916A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010017732A1 (en) * | 1999-12-15 | 2001-08-30 | Takeshi Akiyama | Optical system and optical apparatus having the same |
| CN101655391A (en) * | 2009-08-28 | 2010-02-24 | 中国科学院光电技术研究所 | Improved day star detecting device |
| CN103472581A (en) * | 2013-09-11 | 2013-12-25 | 中国科学院光电技术研究所 | Method for serialization of catadioptric zoom system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643592A (en) * | 2017-10-27 | 2018-01-30 | 上海理工大学 | A kind of varifocal catadioptric optical system of long-focus |
| CN107942480A (en) * | 2017-12-14 | 2018-04-20 | 中国科学院光电技术研究所 | A kind of catadioptric mixing infrared optical imaging system of new zoom ratio |
| CN108873229A (en) * | 2018-06-27 | 2018-11-23 | 湖北华中光电科技有限公司 | A kind of double smart tracking lens of focusing |
| CN109581646A (en) * | 2019-01-25 | 2019-04-05 | 中国科学院云南天文台 | A kind of Multifunction astronomical observation device and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103293681B (en) | Two-channel optical device with ultra large diameter and ultra long focal distance | |
| JP2014130375A5 (en) | ||
| JP2012247811A5 (en) | ||
| CN104297916A (en) | Method for expanding focal length of large-diameter refraction and reflection zoom system | |
| CN106443993B (en) | A kind of three visual field LONG WAVE INFRARED system of compact double light path | |
| CN103472581B (en) | A kind of method of serialization of catadioptric zoom system | |
| CN103558679B (en) | LONG WAVE INFRARED three visual field optical systems | |
| US10359612B2 (en) | Microscopical imaging system | |
| CN103197409B (en) | Optical compensation zoom lens | |
| CN103913840B (en) | Heavy caliber refraction-reflection type three constituent element continuous zooming optical system | |
| CN102879890B (en) | Varifocal optical system with long focus and large relative aperture | |
| CN102253479B (en) | Principal focus type refracting-reflecting optical system | |
| RU2663313C1 (en) | Telephoto lens with two fields of view for the spectrum middle ir area | |
| CN204945480U (en) | Large target surface continuous zooming optical system | |
| CN101609206A (en) | Dual waveband optical zoom lens | |
| CN106526819A (en) | Day-night type high-multiplying-power high-definition continuous zooming optical lens | |
| US10197777B2 (en) | Optical lens | |
| KR101554130B1 (en) | Long wavelength infrared optical system with wide field of view | |
| CN202615033U (en) | Visible-light infrared-ray confocal lens | |
| CN104090351B (en) | Wide spectral day and night Large visual angle monitoring camera | |
| GB2532840A (en) | Wide-angle lens | |
| CN202615032U (en) | High resolution dual-waveband optical zoom lens | |
| CN104914560A (en) | Endoscope objective lens with large field of view and large depth of field | |
| CN105974566B (en) | A kind of big zoom ratio Zigzag type medium wave infrared continuous zoom lens | |
| CN105044891B (en) | A kind of big target surface continuous zooming optical system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150121 |