CN101750723A - Zoom infrared optical system, zooming device and manufacturing method thereof - Google Patents
Zoom infrared optical system, zooming device and manufacturing method thereof Download PDFInfo
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- CN101750723A CN101750723A CN200910273508A CN200910273508A CN101750723A CN 101750723 A CN101750723 A CN 101750723A CN 200910273508 A CN200910273508 A CN 200910273508A CN 200910273508 A CN200910273508 A CN 200910273508A CN 101750723 A CN101750723 A CN 101750723A
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- 210000000695 crystalline len Anatomy 0.000 claims description 345
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- 229910052732 germanium Inorganic materials 0.000 claims description 5
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Abstract
The invention relates to a zoom infrared optical system, a zooming device and a manufacturing method thereof, in particular to a multi-gear zoom infrared optical system, a linearly cut-in zooming device and a manufacturing method thereof. The zooming device comprises a long-focus lens group and a zooming lens group, wherein lens materials are both optical materials which can work on an infrared wave band; the long-focus lens group consists of a front fixed lens group and a rear fixed lens group; the zooming lens group is positioned between the front fixed lens group and the rear fixed lens group; during long-focus imaging, the zooming lens group is positioned outside a light path between the front fixed lens group and the rear fixed lens group; and during zooming imaging, the zooming lens group moves parallelly and linearly cuts in the light path between the front fixed lens group and the rear fixed lens group through a control mechanism, and the central optical axis of the zooming lens group coincides with that between the front fixed lens group and the rear fixed lens group. The zoom infrared optical system, the zooming device and the manufacturing method thereof have the advantages that: due to the adoption of the linearly cut-in zooming mode, the multi-gear zooming infrared optical system overcomes the defect of the traditional zooming mode, can effectively enhance the operating distance and the resolving capability of the system and realize multi-gear focus and field-of-view.
Description
Technical field
The present invention relates to a kind of Zoom infrared optical system and zoom lens control device and manufacture method, specifically relate to the zoom lens control device and the manufacture method of many grades of Zoom infrared optical systems and straight line incision.
Background technology
Variable focal length optical system is to utilize in the optical system moving of a group or above lens combination, changes the combined focal length of system, keeps last image planes constant simultaneously.Because variable focal length optical system can change the focal length of system within the specific limits rapidly, obtain resembling and the visual field of different proportion, in field of optical applications, all obtained a large amount of utilizations.Zoom infrared optical system then is to adopt the infrared optical material work in infrared band as the lens constituent element, and the infrared energy radiation in the external world is focused on, and assembles to be imaged onto on the infrared eye target surface.Optical system is made up of fixed lens constituent element and mobile lens constituent element, and the mobile lens constituent element moves in system and changes focal length to obtain different visual field multiplying powers, realizes different observing effects.
Zoom infrared optical system when particularly being used with the refrigeration mode detector, need guarantee that the cold screen of system aperture diaphragm and detector matches, thereby realizes 100% required cold stop effect of refrigeration mode detector.Therefore, traditional zoom generally is to adopt variable focus lens package to move along optical axis direction apart from infrared optical system, realizes different focal powers in different positions, thereby obtains different enlargement ratios.Two kinds of zoom modes of two grades of zooms and continuous vari-focus are generally arranged, and the former utilizes to become doubly two conjugate position varifocal imagings of group, and the latter adopts a plurality of mirror group motion compensation varifocal imagings.The optical system variable focus lens package of traditional approach zoom is in all the time and participates in imaging in the light path, and to all generation effects of each focal length of system, there is following major defect in this technical approach:
(1) it is many to grow burnt system lens, and transmitance is not high relatively.Because the varifocal mirror group is in all the time and participates in imaging in the light path, in order to take into account the image quality of burnt each visual field of length simultaneously, system needs the lens of a greater number to carry out aberration balancing and global optimization, thereby cause the burnt end of system head lens numbers many, transmitance is not high, has restricted the raising of systemic effect distance.
(2) picture element is subjected to the zoom factor affecting.Because the varifocal mirror group all participates in imaging in each visual field, so the mismachining tolerance of varifocal mirror group just directly causes negative effect to the image quality of each visual field with debuging positioning error, restricted the raising of system resolution.
(3) visual field and motion constituent element limited amount system.Utilize the twice zoom system, pancreatic system that becomes the doubly conjugate position imaging of group can only realize the conversion of two visual fields, and the continuous vari-focus system can realize the conversion of a plurality of visual fields, but the motion constituent element is many, and system's change times multiplying power is big more, it is just long more that system's change times group moves axially stroke, and the visual field is also just long more switching time.
Occurred in recent years adopting flip-flop movement mechanism to realize the infrared optical system of two grades of zooms, distinguished to some extent, obtained certain application with traditional zoom form.But this Zoom lens group rotatablely moves and realizes the mode of zoom, because mode of motion is limit, for fear of the long burnt light of Zoom lens group cutting, need to reserve enough intervals between the positive negative lens of Zoom lens group, unaffected to guarantee long burnt light path, the axial length of Zoom lens group is just long, has also limited the degree of freedom of optical design; Because Zoom lens group axial length is oversize, and the system that adopts this zoom mode is under the condition of limited of space, the general work visual field only is provided with 2 simultaneously.
Summary of the invention
The objective of the invention is to: at the conventional axial motion zoom system, pancreatic system of prior art and the deficiency of flip-flop movement zoom system, pancreatic system existence, the present invention adopts many grades of Zoom infrared optical systems of straight line incision zoom mode, remedied the defective of traditional zoom apart from mode, systemic effect distance and resolution characteristic be can effectively improve, many grades of focal lengths and visual field realized.
The technical scheme of a kind of Zoom infrared optical system of the present invention is:
A kind of Zoom infrared optical system is characterized in that: it comprises a long focus lens group and Zoom lens group, and lens material all is the optical materials that can work in infrared band; Described long focus lens group is made of preceding fixed lens group and back fixed lens group; The Zoom lens group is between preceding fixed lens group and back fixed lens group:
When the burnt imaging of length, the Zoom lens group is beyond the light path between preceding fixed lens group and the back fixed lens group; When the varifocal imaging, the Zoom lens group by the parallel mobile straight line incision of control gear before in the light path between fixed lens group and the back fixed lens group, and the Zoom lens group switching centre optical axis of straight line when cutting overlaps with central optical axis between the forward and backward fixed lens group.
Further, the technical scheme with additional technical feature is:
Described Zoom infrared optical system, its preceding fixed lens group comprise preceding first fixed lens and preceding second fixed lens; Every group of Zoom lens group is made of at least two lens.
Described Zoom infrared optical system, its control gear are man-operated mechanism or the motor drive mechanisms that includes line slideway.
Described Zoom infrared optical system, its lens material are monocrystalline germanium or monocrystalline silicon.
The technical scheme of a kind of infrared optical system zoom lens control device of the present invention is:
A kind of infrared optical system zoom lens control device is characterized in that: it has a housing, and its inside is equipped with optical lens group, comprising: long focus lens group and Zoom lens group; Lens material all is the optical materials that can work in infrared band; Described long focus lens group is made up of preceding fixed lens group that is installed on housing one end and the back fixed lens group that is installed on the housing other end; There is one to be used for the control gear that parallel lines moves the Zoom lens group between preceding fixed lens group and the back fixed lens group; This control gear comprises guide rail, the motor that screw mandrel and housing are outer; Guide rail is perpendicular to the forward and backward fixed lens group central optical axis between preceding fixed lens group and the back fixed lens group, and the Zoom lens group is installed on the guide rail; The screw mandrel that is used to drive the Zoom lens group is connected with the Zoom lens group, and motor is connected with screw mandrel; When the burnt imaging of length, the Zoom lens group is beyond the light path between preceding fixed lens group and the back fixed lens group; When the varifocal imaging, the Zoom lens group by the parallel mobile straight line incision of control gear before in fixed lens group and the back light path between the fixed lens group, and Zoom lens group switching centre optical axis overlaps with central optical axis between the forward and backward fixed lens group.
Further, the technical scheme with additional technical feature is:
Described infrared optical system zoom lens control device, its preceding fixed lens group is made of two fixed lenss; Back fixed lens group is made of a lens combination or a catoptron and a lens combination.
Described infrared optical system zoom lens control device, its Zoom lens group has one or more groups, and every group by two or be no less than two lens and constitute.
Described infrared optical system zoom lens control device, its Zoom lens group has two groups, and it is the first Zoom lens group and the second Zoom lens group in the light path that can cut respectively between preceding fixed lens group and the back fixed lens group; This first Zoom lens group and the second Zoom lens group constitute by three lens; The first Zoom lens group and the second Zoom lens group each have independently guide rail, screw mandrel and motor.
Described infrared optical system zoom lens control device, its lens material all are the optical materials that can work in infrared band.
A kind of manufacture method that realizes above-mentioned infrared optical system zoom lens control device of the present invention, it comprises the steps:
Determining of A, optical lens group: preceding fixed lens group is the positive focal length constituent element with the back fixed lens group, the Zoom lens group is made of the negative lens combination that is just making up, before determining, behind fixed lens group focal length and the back fixed lens group enlargement ratio, calculate the focal length of the negative positive lens groups of Zoom lens group again; Lens material all is the optical materials that can work in infrared band;
The manufacturing of B, control gear: control gear is that the gear train of Zoom lens group also is a supporting mechanism, and the technical parameter of each assembly comprises:
A, assembly quality of fit: be used to satisfy the central optical axis registration between Zoom lens group switching centre optical axis and the forward and backward fixed lens group;
B, screw rod, the parameter of electric machine: the speed that Zoom lens group switching centre optical axis and central optical axis between the forward and backward fixed lens group overlap and separate when being used to limit the straight line incision;
The setting accuracy parameter that c, Zoom lens group switching centre optical axis and central optical axis between the forward and backward fixed lens group overlap and separate puts in place and is offset the precision metering with optical axis.
Further, the technical scheme with additional technical feature is:
The manufacture method of described infrared optical system zoom lens control device, the focal length of the negative positive lens groups of its Zoom lens group is to obtain by the tangent computing method in the The Calculation of Optical Path:
At first, interval, Zoom lens group before the initial setting between the interval of fixed lens group and Zoom lens group, the negative positive lens of Zoom lens group arrive Polaroid interval, high light of known projection of beginning trace is high in angle, input aperture, outgoing aperture angle, the projection of each mirror group by calculating this light; Obtain the focal length of the negative positive lens groups of Zoom lens group then respectively by formula tanU '=tanU+h/f ' and h '=h-dtanU.
Outstanding feature of the present invention and good effect mainly contain:
(1) effectively minimizing system head Jiao holds lens numbers, improves the long burnt transmitance of infrared optical system.Switch Zoom infrared optical system when long burnt end work, the Zoom lens group is to be positioned at not participate in long burnt imaging beyond the light path, system's lens numbers of long so burnt end can significantly reduce, thereby improves long burnt system transmitance, and the raising system is to the detectivity of distant object.
(2) can effectively reduce the error component of system, the burnt end of raising system head picture element.The Zoom lens group of switching Zoom infrared optical system is in beyond the light path when the burnt imaging of length, therefore long burnt image quality is not constituted influence, like this mismachining tolerance of varifocal mirror group with debug positioning error and just can not influence the image quality of long burnt end, thereby guarantee that long burnt system has more excellent picture element, improved the resolution characteristic of the burnt end of system head.
(3) can realize the independent assortment of a plurality of visual fields.Utilize the Zoom lens group beyond long burnt imaging is in light path and the big characteristics of design freedom, can design a plurality of Zoom lens groups, be used in combination with long burnt visual field, realize the independent assortment that a plurality of visual fields are flexible and changeable, even in use can directly change to short Jiao from length is eager, and the transition of visual field in the middle of not needing.
Description of drawings
Fig. 1 is the long focus lens group principle schematic of Zoom infrared optical system of the present invention;
Fig. 2 is the principle schematic after the Zoom lens group straight line of Zoom infrared optical system of the present invention is cut long focus lens group;
Fig. 3 has the principle schematic of two Zoom lens groups for Zoom infrared optical system of the present invention;
Fig. 4 is a kind of infrared optical system zoom lens control device of the present invention structure cut-open view;
Fig. 5 passes letter figure for small field of view;
Fig. 6 is that middle visual field passes letter figure;
Fig. 7 is that big visual field passes letter figure.
The title of mark correspondence is as follows among the figure:
The long focus lens group of 1-; 1.1-preceding fixed lens group; 1.2-back fixed lens group; 1.1a-preceding first fixed lens; 1.1b-preceding second fixed lens; 1.10-the central optical axis between the forward and backward fixed lens group; 2-Zoom lens group; 2.1-the first Zoom lens group; 2.2-the second Zoom lens group; 2.10-the first Zoom lens group switching centre optical axis; 2.20-the second Zoom lens group switching centre optical axis; The 3-control gear; 3.1-guide rail; 3.2-screw mandrel; 3.3-motor; 3.4-shaft coupling; The 4-housing.
Embodiment
It is as follows that the invention will be further described in conjunction with the accompanying drawings and embodiments:
As shown in Figure 1, 2, 3, be an embodiment of a kind of Zoom infrared optical system of the present invention:
A kind of Zoom infrared optical system, it has a long focus lens group 1 and Zoom lens group 2, and lens material all is the optical materials that can work in infrared band; Described long focus lens group 1 is made of preceding fixed lens group 1.1 and back fixed lens group 1.2; Zoom lens group 2 is between preceding fixed lens group 1.1 and the back fixed lens group 1.2: during when the burnt imaging of length, Zoom lens group 2 is beyond the light path between preceding fixed lens group 1.1 and the back fixed lens group 1.2; When the varifocal imaging, Zoom lens group 2 by the parallel mobile straight line incision of control gear before in the light path between fixed lens group 1.1 and the back fixed lens group 1.2, and the Zoom lens group switching centre optical axis of straight line when cutting overlaps with central optical axis 1.10 between the forward and backward fixed lens group.Fixed lens group 1.1 has preceding first fixed lens 1.1a and the preceding second fixed lens 1.1b before described; 2 every groups of Zoom lens groups are made of at least two lens.Present embodiment Zoom lens group 2 has two groups, and every group is made of three lens.Described control gear has the motor drive mechanism of line slideway, also can be man-operated mechanism.Described lens material is a monocrystalline germanium, also can select monocrystalline silicon for use.
As shown in Figure 4, be the embodiment of a kind of infrared optical system zoom lens control device of the present invention:
A kind of infrared optical system zoom lens control device, it has a housing 4, and its inside is equipped with optical lens group, and inside has: long focus lens group 1 and Zoom lens group 2; Lens material all is the optical materials that can work in infrared band; Described long focus lens group 1 is made up of preceding fixed lens group 1.1 that is installed on housing 4 one ends and the back fixed lens group 1.2 that is installed on housing 4 other ends; There is one to be used for the control gear 3 that parallel lines moves Zoom lens group 2 between preceding fixed lens group 1.1 and the back fixed lens group 1.2; This control gear 3 has guide rail 3.1, the motor 3.3 outside screw mandrel 3.2 and the housing 4; Guide rail 3.1 is perpendicular to the forward and backward fixed lens group central optical axis 1.0 between preceding fixed lens group 1.1 and the back fixed lens group 1.2, and Zoom lens group 2 is installed on the guide rail 3.1; The screw mandrel 3.2 that is used to drive Zoom lens group 2 is connected with Zoom lens group 2, and motor 3.3 is connected with screw mandrel 3.2; When the burnt imaging of length, Zoom lens group 2 is beyond the light path between preceding fixed lens group 1.1 and the back fixed lens group 1.2; When the varifocal imaging, Zoom lens group 2 by control gear 3 parallel mobile straight lines incisions before in fixed lens group 1.1 and the back light path between the fixed lens group 1.2, and Zoom lens group switching centre optical axis overlaps with central optical axis 1.0 between the forward and backward fixed lens group.Fixed lens group 1.1 is made of two fixed lenss before described; Back fixed lens group 1.2 is made of a catoptron and a lens combination, also can be to be made of a lens combination.Described Zoom lens group 2 has one or more groups, every group by two or be no less than two lens and constitute, present embodiment Zoom lens group 2 has two groups, every group is made of three lens, and it is the first Zoom lens group 2.1 and the second Zoom lens group 2.2 in fixed lens group 1.1 and the back light path between the fixed lens group 1.2 before cutting respectively; This first Zoom lens group 2.1 and the second Zoom lens group 2.2 constitute by three lens; The first Zoom lens group 2.1 and the second Zoom lens group 2.2 each have independently guide rail 3.1, screw mandrel 3.2 and motor 3.3.Lens material all is the optical materials that can work in infrared band, specifically uses monocrystalline germanium, also can select monocrystalline silicon for use.
Be the technique effect partial graph of present embodiment shown in Fig. 5,6,7:
The infrared optical system zoom lens control device has been finished preceding fixed lens group 1.1, back fixed lens group 1.2, the first Zoom lens group 2.1, the second Zoom lens group 2.2, the design and optimization of each assemblies such as incision motion: the preceding fixedly group 1.1 of infrared optical system is fixed the small field of view that group 1.2 forms system with the back, after the first Zoom lens group, 2.1 incision systems, form the big visual field of system, after the second Zoom lens group, 2.2 incision systems, form the middle visual field of system, thereby form the third gear working field of view, pass letter figure as Fig. 5 for small field of view, as Fig. 6 is that middle visual field passes letter figure, as Fig. 7 is that big visual field passes letter figure, can freely switch use between the third gear working field of view.Total system is the secondary imaging form, satisfies refrigeration mode infrared system 100% cold stop effect.The biography letter of three visual fields is good, and disc of confusion satisfies the system resolution demand, can realize the image planes compensation of different temperatures in the system works temperature range, but the cold emission of each visual field all in range of receiving, imaging results can satisfy user demand.The control gear of straight line incision can be cut the Zoom lens group rapidly, realizes the visual field conversion, has finally satisfied the observation purpose of many grades of visual fields.
The infrared optical system zoom lens control device also has embodiment: different with above-mentioned zoom lens control device is, its Zoom lens group 2 has one group, is made of three lens, and therefore, control gear 3 has only 3.2, one motors 3.3 of 3.1, one screw mandrels of a guide rail.
A kind of manufacture method that realizes above-mentioned infrared optical system zoom lens control device of the present invention, its step is as follows:
Determining of A, optical lens group: preceding fixed lens group 1.1 is positive focal length constituent elements with back fixed lens group 1.2, Zoom lens group 2 is made of the negative lens combination that is just making up, before determining, behind fixed lens group 1.1 focal lengths and back fixed lens group 1.2 enlargement ratios, calculate the focal length of the negative positive lens groups of Zoom lens group 2 again; Lens material all is the optical materials that can work in infrared band, specifically uses monocrystalline germanium, also can select monocrystalline silicon for use;
The manufacturing of B, control gear: control gear 3 is that the gear train of Zoom lens group 2 also is a supporting mechanism, and the technical parameter of each assembly comprises:
A) assembly quality of fit: be used to satisfy central optical axis 1.0 registrations between Zoom lens group switching centre optical axis and the forward and backward fixed lens group;
B) screw rod 3.2, motor 3.3 parameters: the speed that Zoom lens group switching centre optical axis and central optical axis 1.10 between the forward and backward fixed lens group overlap and separate when being used to limit the straight line incision;
C) central optical axis between Zoom lens group switching centre optical axis and the forward and backward fixed lens group 1.10 setting accuracy parameter that overlaps and separate puts in place and is offset the precision metering with optical axis;
The focal length of Zoom lens group 2 negative positive lens groups is to obtain by the tangent computing method in the The Calculation of Optical Path:
At first, the interval of fixed lens group 1.1 and Zoom lens group 2, the interval between the Zoom lens group 2 negative positive lenss, Zoom lens group 2 arrive Polaroid interval before the initial setting, high light of known projection of beginning trace is high in angle, input aperture, outgoing aperture angle, the projection of each mirror group by calculating this light; By formula tanU '=tanU+h/f ' and h '=h-dtanU,, obtain the focal length of the negative positive lens groups of Zoom lens group 2 respectively then to each mirror group computing repeatedly.
Claims (10)
1. Zoom infrared optical system, it is characterized in that: it comprises a long focus lens group (1) and Zoom lens group (2), and lens material all is the optical materials that can work in infrared band; Described long focus lens group (1) is made of preceding fixed lens group (1.1) and back fixed lens group (1.2); Zoom lens group (2) is positioned between preceding fixed lens group (1.1) and the back fixed lens group (1.2):
When long burnt imaging, Zoom lens group (2) is positioned at beyond preceding fixed lens group (1.1) and the back light path between the fixed lens group (1.2); When the varifocal imaging, Zoom lens group (2) by the parallel mobile straight line incision of control gear before in the light path between fixed lens group (1.1) and the back fixed lens group (1.2), and the Zoom lens group switching centre optical axis of straight line when cutting overlaps with central optical axis (1.10) between the forward and backward fixed lens group.
2. Zoom infrared optical system according to claim 1 is characterized in that: fixed lens group (1.1) comprises preceding first fixed lens (1.1a) and preceding second fixed lens (1.1b) before described; Every group of Zoom lens group (2) is made of at least two lens.
3. Zoom infrared optical system according to claim 1 and 2 is characterized in that: described control gear is man-operated mechanism or the motor drive mechanism that includes line slideway.
4. Zoom infrared optical system according to claim 1 is characterized in that: described lens material is monocrystalline germanium or monocrystalline silicon.
5. infrared optical system zoom lens control device, it is characterized in that: it has a housing (4), and its inside is equipped with optical lens group, comprising: a long focus lens group (1) and Zoom lens group (2); Lens material all is the optical materials that can work in infrared band; Described long focus lens group (1) is made up of preceding fixed lens group (1.1) that is installed on housing (4) one ends and the back fixed lens group (1.2) that is installed on housing (4) other end; There is one to be used for the control gear (3) that parallel lines moves Zoom lens group (2) between preceding fixed lens group (1.1) and the back fixed lens group (1.2); This control gear (3) comprises guide rail (3.1), the motor (3.3) that screw mandrel (3.2) and housing (4) are outer; Guide rail (3.1) is perpendicular to the forward and backward fixed lens group central optical axis (1.0) between preceding fixed lens group (1.1) and the back fixed lens group (1.2), and Zoom lens group (2) is installed on the guide rail (3.1); The screw mandrel (3.2) that is used to drive Zoom lens group (2) is connected with Zoom lens group (2), and motor (3.3) is connected with screw mandrel (3.2); When long burnt imaging, Zoom lens group (2) is positioned at beyond preceding fixed lens group (1.1) and the back light path between the fixed lens group (1.2); When the varifocal imaging, Zoom lens group (2) by the parallel mobile straight line incision of control gear (3) before in fixed lens group (1.1) and the back light path between the fixed lens group (1.2), and Zoom lens group switching centre optical axis overlaps with central optical axis (1.0) between the forward and backward fixed lens group.
6. infrared optical system zoom lens control device according to claim 5 is characterized in that: fixed lens group (1.1) is made of two fixed lenss before described; Back fixed lens group (1.2) is made of a lens combination or a catoptron and a lens combination.
7. infrared optical system zoom lens control device according to claim 5 is characterized in that: described Zoom lens group (2) has one or more groups, and every group by two or be no less than two lens and constitute.
8. infrared optical system zoom lens control device according to claim 7, it is characterized in that: described Zoom lens group (2) has two groups, and it is the first Zoom lens group (2.1) and the second Zoom lens group (2.2) in the light path that can cut respectively between preceding fixed lens group (1.1) and the back fixed lens group (1.2); This first Zoom lens group (2.1) and the second Zoom lens group (2.2) constitute by three lens; The first Zoom lens group (2.1) and the second Zoom lens group (2.2) each have independently guide rail (3.1), screw mandrel (3.2) and motor (3.3).
9. a manufacture method of producing the described infrared optical system zoom lens control device of any one claim of claim 5 to 8 is characterized in that it comprises the steps:
Determining of A, optical lens group: preceding fixed lens group (1.1) is the positive focal length constituent element with back fixed lens group (1.2), Zoom lens group (2) is made of the negative lens combination that is just making up, before determining, behind fixed lens group (1.1) focal length and back fixed lens group (1.2) enlargement ratio, calculate the focal length of the negative positive lens groups of Zoom lens group (2) again; Lens material all is the optical materials that can work in infrared band;
The manufacturing of B, control gear: control gear (3) is that the gear train of Zoom lens group (2) also is a supporting mechanism, and the technical parameter of each assembly comprises:
A) assembly quality of fit: be used to satisfy central optical axis (1.0) registration between Zoom lens group switching centre optical axis and the forward and backward fixed lens group;
B) screw rod (3.2), motor (3.3) parameter: central optical axis (1.10) coincidence when being used to limit the straight line incision between Zoom lens group switching centre optical axis and the forward and backward fixed lens group and the speed of separating;
C) the setting accuracy parameter that overlaps and separates of the central optical axis (1.10) between Zoom lens group switching centre optical axis and the forward and backward fixed lens group puts in place and is offset precision with optical axis and measures.
10. according to the manufacture method of the described infrared optical system zoom lens control device of claim 9, it is characterized in that the focal length of the negative positive lens groups of described Zoom lens group (2) is to obtain by the tangent computing method in the The Calculation of Optical Path:
At first, interval, Zoom lens group (2) before the initial setting between the interval of fixed lens group (1.1) and Zoom lens group (2), the negative positive lens of Zoom lens group (2) arrive Polaroid interval, high light of known projection of beginning trace is high in angle, input aperture, outgoing aperture angle, the projection of each mirror group by calculating this light; Pass through the focal length that formula: tanU '=tanU+h/f ' and h '=h-dtanU obtain the negative positive lens groups of Zoom lens group (2) respectively then.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102213822A (en) * | 2011-07-12 | 2011-10-12 | 中国电子科技集团公司第十一研究所 | Medium wave infrared continuous zoom lens |
| CN104020557A (en) * | 2014-06-25 | 2014-09-03 | 中国船舶重工集团公司第七一七研究所 | Monocular and quasibinocular transformation observing optical device |
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Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6160668A (en) * | 1998-05-14 | 2000-12-12 | Pilkington Pe Limited | Optical systems |
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2009
- 2009-12-31 CN CN200910273508A patent/CN101750723B/en not_active Expired - Fee Related
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| CN102213822B (en) * | 2011-07-12 | 2013-03-13 | 中国电子科技集团公司第十一研究所 | Medium wave infrared continuous zoom lens |
| CN102213822A (en) * | 2011-07-12 | 2011-10-12 | 中国电子科技集团公司第十一研究所 | Medium wave infrared continuous zoom lens |
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| CN110749986B (en) * | 2019-11-11 | 2023-07-04 | 中国科学院上海技术物理研究所 | Infrared continuous zoom area array scanning optical system and image shift compensation method |
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