CN107907988B - A kind of double light fusion optical systems - Google Patents
A kind of double light fusion optical systems Download PDFInfo
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- CN107907988B CN107907988B CN201711189797.4A CN201711189797A CN107907988B CN 107907988 B CN107907988 B CN 107907988B CN 201711189797 A CN201711189797 A CN 201711189797A CN 107907988 B CN107907988 B CN 107907988B
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- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/02—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of crystals, e.g. rock-salt, semi-conductors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Astronomy & Astrophysics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Lenses (AREA)
Abstract
The invention discloses a kind of double light to merge optical system, including low-light-level optical system and LONG WAVE INFRARED optical system, is both equipped with focusing group, the drift of optical system image planes when being moved forward and backward compensation temperature along optical axis and be closely imaged；The low-light-level optical system is made of Weak light one, Weak light two, low-light cemented objective one, low-light cemented objective two, Weak light three and Weak light four；The LONG WAVE INFRARED optical system is made of infrared objective one, infrared objective two and infrared objective three, and the diaphragm of LONG WAVE INFRARED optical system is located at one front surface of infrared objective, and infrared channel focusing group is made of infrared objective two and infrared objective three.Low-light-level optical system of the present invention uses conventional visible material, and LONG WAVE INFRARED optical system is carried out aspheric design, improved the image quality of optical system, shorten length using conventional germanium single crystal material.
Description
Technical field
The invention patent belongs to optical technical field, and in particular to a kind of double light fusion optical systems.
Background technique
Fusion telescope is the important equipment that moderate distance is scouted, with single pass low-light or Infrared Hand-Held telescope phase
Than, can adapt to more complicated ambient enviroment, can be provided simultaneously with twilight image scene detailed information abundant and infrared figure
The contrast of picture is high, dynamic range is big and the ability of penetrating fog, rain, snow, and therefore, fusion telescope is conducive to comprehensive infrared image
Preferable Target indication characteristic and twilight image clearly scene information.
Good observing effect is obtained to make to merge telescope, image co-registration quality is most important, for this purpose, low-light-level optical system
Matched design must be carried out with infrared optical system, the same target of object space should be guaranteed in low-light-level optical system and LONG WAVE INFRARED light
System image planes occupy identical pixel number, guarantee that the two has the distortion of the Pixel-level of same type again, while needing to examine
In the case of worry high/low temperature the problems such as the offset of image planes, to reduce the registration difficulty and fusion accuracy of image in operating temperature range,
Promote fusion telescope observing effect.
Summary of the invention
The object of the present invention is to provide a kind of double light to merge optical system, includes low-light-level optical system and LONG WAVE INFRARED optics
System all has the extra small barrel distortion of Pixel-level, carries out temperature-compensating using interior focusing mechanism, reduces movement mechanism to fusion
The influence of optical axis further decreases image registration difficulty, improves image co-registration quality.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of double light fusion optical systems, including low-light-level optical system and LONG WAVE INFRARED optical system, are both equipped with and adjust
Burnt group, the drift of optical system image planes when being moved forward and backward compensation temperature along optical axis and be closely imaged；
The low-light-level optical system focal length is 39.2mm, and F number is 1.4, and service band is 480nm~900nm, maximum view
Distortion is -0.06% at, and low-light-level optical system is successively glued by Weak light one, Weak light two, low-light from the object side to the image side
Object lens one, low-light cemented objective two, Weak light three and Weak light four form, and the diaphragm of low-light-level optical system is located at low-light glue
One rear surface of object lens is closed, focusing group in low-light channel is made of low-light cemented objective two, Weak light three and Weak light four；
The LONG WAVE INFRARED optical system focal length is 37mm, and F number is 1.0, and service band is 8000nm~12000nm,
Distortion is -0.097% at maximum field of view, and LONG WAVE INFRARED optical system is from the object side to the image side successively by infrared objective one, infrared objective
Two and infrared objective three form, the diaphragm of LONG WAVE INFRARED optical system is located at one front surface of infrared objective, infrared channel focusing group
It is made of infrared objective two and infrared objective three.
A kind of double light merge optical system, and Weak light is first is that a piece of have positive light coke weight crown bent moon saturating
Mirror；The Weak light is second is that a piece of have positive light coke lanthanum flint meniscus lens；The low-light cemented objective one is by one
Piece with positive light coke fluorine crown convex plano lens and it is a piece of have negative power dense flint plano-concave lens composition, plane is cemented surface；
The low-light cemented objective two is by a piece of with positive light coke flint biconcave lens and a piece of double with negative power lanthanum flint
Convex lens group at；Weak light three is a piece of with positive light coke biconvex lanthanum flint lens；Weak light four is a piece of with just
Angular bent moon lanthanum flint lens.
A kind of double light merge optical system, and infrared objective is first is that a piece of bent moon monocrystalline germanium with positive light coke
Lens；The infrared objective is second is that a piece of bent moon monocrystalline germainium lens with positive light coke；The infrared objective is third is that one
Piece has the bent moon monocrystalline germainium lens of positive light coke.
The beneficial effects of the present invention are:
By accurately being controlled low-light-level optical system and LONG WAVE INFRARED optical system focal length, the same mesh of object space may make
It is marked on low-light-level optical system and LONG WAVE INFRARED optical system image planes occupies identical pixel number, the two has same type Pixel-level
Extra small distortion is conducive to obtain good fused image quality and precision；
Low-light-level optical system uses conventional visible material, and LONG WAVE INFRARED optical system uses conventional germanium single crystal material, into
Row aspheric design improves the image quality of optical system, shortens length.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of low-light-level optical system of the present invention；
Fig. 2 is the structural schematic diagram of LONG WAVE INFRARED optical system of the present invention；
Fig. 3 is that the present invention learns ssystem transfer function figure；
Fig. 4 is optical system distortion figure of the present invention.
Each appended drawing reference are as follows: 1-Weak light one, 2-Weak lights two, 3-low-light cemented objectives one, 4-low-light glue
Close object lens two, 5-Weak lights three, 6-Weak lights four, 7-infrared objectives one, 8-infrared objectives two, 9-infrared objectives
Three.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in further details through this embodiment.
The invention discloses a kind of double light to merge optical system, including low-light-level optical system and LONG WAVE INFRARED optical system,
It is both equipped with focusing group, the drift of optical system image planes, focusing when being moved forward and backward compensation temperature along optical axis and be closely imaged
Group is all made of interior focusing mode, reduces influence of the movement mechanism to fusion optical axis.
Fig. 1, Fig. 2 are the structural schematic diagram of low-light-level optical system and LONG WAVE INFRARED optical system of the present invention respectively.Institute
The low-light-level optical system focal length stated is 39.2mm, and F number is 1.4, and service band is 480nm~900nm, is distorted at maximum field of view
It is -0.06%.
Low-light-level optical system is from the object side to the image side successively by Weak light 1, Weak light 22, low-light cemented objective one
3, low-light cemented objective 24, Weak light 35 and Weak light 46 form, and the diaphragm of low-light-level optical system is located at low-light gluing
One 3 rear surface of object lens, low-light channel focusing group are made of low-light cemented objective 24, Weak light 35 and Weak light 46, edge
The drift of low-light-level optical system image planes when optical axis is moved forward and backward compensation temperature and is closely imaged.
The LONG WAVE INFRARED optical system focal length is 37mm, and F number is 1.0, and service band is 8000nm~12000nm,
Distortion is -0.097% at maximum field of view.
LONG WAVE INFRARED optical system is from the object side to the image side successively by infrared objective 1, infrared objective 28 and infrared objective three
9 compositions, the diaphragm of LONG WAVE INFRARED optical system are located at one 7 front surface of infrared objective, and infrared channel focusing group is by infrared objective 28
It is formed with infrared objective 39, long wave infrared optical system image planes when being moved forward and backward compensation temperature along optical axis and be closely imaged
Drift.
When operating temperature is in -40 °~+60 ° variations, with identical after low-light-level optical system and infrared optical system focusing
Focal length variations trend, and variable quantity is approximately equal proportion, be ensure that in entire working range, and the same target of object space is in low-light
Optical system and LONG WAVE INFRARED optical system image planes occupy identical pixel number, reduce image co-registration difficulty.
Fig. 3 and Fig. 4 is the optical simulation datagram of the invention patent optical system.
Wherein:
Fig. 3 a is transfer curve figure of the low-light-level optical system in 32lp/mm, and Fig. 3 b is LONG WAVE INFRARED optical system
Transfer curve figure in 32lp/mm, and the demand pairs that its abscissa is every millimeter, ordinate are contrast numerical value；
Fig. 4 a is the invention patent low-light-level optical system distortion figure, and Fig. 4 b is the invention patent LONG WAVE INFRARED optical system
Distortion figure.
Wherein:
Weak light 1 is bent moon positive lens of a piece of convex surface towards object space, material HZK10；
Weak light 22 is bent moon positive lens of a piece of convex surface towards object space, material HLAF3；
Low-light cemented objective 1 has negative power, is saturating by the plano-convex of convex surface towards object space that one piece material is HFK61
The plano-concave lens of the plane that mirror and one piece material are HZF50 towards object space forms；
The specific positive light coke of low-light cemented objective 24 is double-concave negative lens and a sheet material by one piece material for HF4 material
The biconvex positive lens that material is HLAF3 form；
Weak light 35 is the biconvex positive lens that one piece material is HLAF3；Weak light 46 is that one piece material is HLAF3
Convex surface towards object space bent moon positive lens；
Infrared objective 1 is a piece of bent moon monocrystalline germainium lens with positive light coke；
Infrared objective 28 is a piece of bent moon monocrystalline germainium lens with positive light coke；
Infrared objective 39 is a piece of bent moon monocrystalline germainium lens with positive light coke.
The specific design parameter of the low-light-level optical system of the present embodiment see the table below.
The specific design parameter of LONG WAVE INFRARED optical system of the present embodiment see the table below.
In both the above table, radius of curvature refers to the radius of curvature of each lens surface, and thickness or interval refer to eyeglass thickness
Degree or adjacent mirror surface distance, material are eyeglass material therefors, and air refers to that medium is air between two lens.
The transfer function values of the present embodiment see the table below.
To obtain relatively good image quality, LONG WAVE INFRARED system is aspherical using two panels, is located at the of infrared objective one
Second face in two faces and infrared objective two.Following table is asphericity coefficient used in the present embodiment.
Aspherical equation is defined as follows:
。
The present invention is proved by actual use: double light merge optical system, and there is the same type of Pixel-level to distort, in work
Make within the scope of -40 °~+60 ° of temperature, focusing has carried out accurate control, ensure that the same target of object space in low-light-level optical system
Identical pixel number is occupied with LONG WAVE INFRARED optical system image planes, is conducive to obtain good fused image quality and precision
Finally it should be noted that: the present invention is not limited to the above embodiments, and those skilled in the art should
Understand, can also be modified or replaced equivalently without departing from the purpose of the present invention.
The above-described embodiments merely illustrate the principles and effects of the present invention, and the embodiment that part uses, for
For those skilled in the art, without departing from the concept of the premise of the invention, can also make it is several deformation and
It improves, these are all within the scope of protection of the present invention.
Claims (3)
1. a kind of double light merge optical system, it is characterised in that: including low-light-level optical system and LONG WAVE INFRARED optical system, the two
It is equipped with focusing group, the drift of optical system image planes when being moved forward and backward compensation temperature along optical axis and be closely imaged；
The low-light-level optical system focal length is 39.2mm, and F number is 1.4, and service band is 480nm~900nm, at maximum field of view
Distortion is -0.06%, and low-light-level optical system is from the object side to the image side successively by Weak light one (1), Weak light two (2), low-light glue
Object lens one (3), low-light cemented objective two (4), Weak light three (5) and Weak light four (6) composition are closed, low-light-level optical system
Diaphragm is located at low-light cemented objective one (3) rear surface, and focusing group in low-light channel is by low-light cemented objective two (4), Weak light three
(5) it is formed with Weak light four (6)；
The LONG WAVE INFRARED optical system focal length is 37mm, and F number is 1.0, and service band is 8000nm~12000nm, maximum
Distortion is -0.097% at visual field, and LONG WAVE INFRARED optical system is from the object side to the image side successively by infrared objective one (7), infrared objective
Two (8) and infrared objective three (9) composition, the diaphragm of LONG WAVE INFRARED optical system is located at infrared objective one (7) front surface, infrared logical
Focusing group in road is made of infrared objective two (8) and infrared objective three (9).
2. a kind of double light according to claim 1 merge optical system, which is characterized in that the Weak light one (1)
It is a piece of heavy crown meniscus lens with positive light coke；The Weak light two (2) is a piece of lanthanum fire with positive light coke
Stone meniscus lens；The low-light cemented objective one (3) is by a piece of fluorine crown convex plano lens with positive light coke and a piece of has
The dense flint plano-concave lens of negative power forms, and plane is cemented surface；The low-light cemented objective two (4) is had just by a piece of
The flint biconcave lens of focal power and a piece of lanthanum flint biconvex lens composition with negative power；Weak light three (5) is one
Piece has the biconvex lanthanum flint lens of positive light coke；Weak light four (6) is that a piece of bent moon lanthanum flint with positive light coke is saturating
Mirror.
3. a kind of double light according to claim 1 merge optical system, which is characterized in that the infrared objective one (7)
It is a piece of bent moon monocrystalline germainium lens with positive light coke；The infrared objective two (8) is a piece of curved with positive light coke
Month monocrystalline germainium lens；The infrared objective three (9) is a piece of bent moon monocrystalline germainium lens with positive light coke.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711189797.4A CN107907988B (en) | 2017-11-24 | 2017-11-24 | A kind of double light fusion optical systems |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711189797.4A CN107907988B (en) | 2017-11-24 | 2017-11-24 | A kind of double light fusion optical systems |
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| CN107907988A CN107907988A (en) | 2018-04-13 |
| CN107907988B true CN107907988B (en) | 2019-03-08 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108919462B (en) * | 2018-07-03 | 2024-08-20 | 广东奥普特科技股份有限公司 | Optical system of large-target-surface wide-working-distance line scanning focal length machine vision lens |
| CN111025607B (en) * | 2019-12-13 | 2024-08-09 | 中国科学院西安光学精密机械研究所 | Long-wave infrared low-temperature optical lens |
| CN112666691B (en) * | 2020-12-22 | 2023-03-10 | 福建福光股份有限公司 | Medium-long-focus low-light-level lens with wide waveband and large image surface and imaging method thereof |
| CN113633245B (en) * | 2021-08-23 | 2023-10-13 | 华中科技大学鄂州工业技术研究院 | Probe type fluorescence confocal endoscope coupling objective optical system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5386315A (en) * | 1991-08-26 | 1995-01-31 | Martin Marietta Corporation | IR fast low light level lens system |
| CN105445930A (en) * | 2014-09-30 | 2016-03-30 | 南京理工大学 | Front end optical-mechanical structure of night vision reconnaissance system fusing infrared light with micro light |
| CN106199925A (en) * | 2016-09-14 | 2016-12-07 | 昆明物理研究所 | Low-light infrared optics image co-registration doublet optical texture |
-
2017
- 2017-11-24 CN CN201711189797.4A patent/CN107907988B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5386315A (en) * | 1991-08-26 | 1995-01-31 | Martin Marietta Corporation | IR fast low light level lens system |
| CN105445930A (en) * | 2014-09-30 | 2016-03-30 | 南京理工大学 | Front end optical-mechanical structure of night vision reconnaissance system fusing infrared light with micro light |
| CN106199925A (en) * | 2016-09-14 | 2016-12-07 | 昆明物理研究所 | Low-light infrared optics image co-registration doublet optical texture |
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