CN204256249U - A kind of near infrared spectral coverage relay imaging mirror group - Google Patents
A kind of near infrared spectral coverage relay imaging mirror group Download PDFInfo
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- CN204256249U CN204256249U CN201420738301.XU CN201420738301U CN204256249U CN 204256249 U CN204256249 U CN 204256249U CN 201420738301 U CN201420738301 U CN 201420738301U CN 204256249 U CN204256249 U CN 204256249U
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- mirror group
- imaging mirror
- mirrors head
- relay imaging
- eyeglass
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Abstract
The utility model discloses a kind of near infrared spectral coverage relay imaging mirror group, comprise the relay imaging mirror group be placed between the preposition imaging lens of light spectrum image-forming light path and photodetector, relay imaging mirror group comprise be positioned at same optical axis and in specular arrange front arrangement of mirrors head and rear arrangement of mirrors head, front arrangement of mirrors head and rear arrangement of mirrors head comprise first single eyeglass, first pair of cemented doublet, second pair of cemented doublet and second single eyeglass laterally successively by image side, and the near infrared spectral range of relay imaging mirror group application is 650 ~ 1100nm.The utility model can combinationally use from the preposition optical lens of different back work distance; Between relay imaging mirror group front arrangement of mirrors head and rear arrangement of mirrors head for parallel light path and between distance can adjust flexibly according to the thickness of spectrum groupware; By suppressing second order spectrum, effectively reduce the aberration of system.Due to the design of the full symmetric of employing, front and rear mirror group only uses a kind of camera lens, and processing cost is lower, and assembling and setting is more prone to.
Description
Technical field
The utility model relates to optical lens technical field, particularly a kind of near infrared spectral coverage relay imaging mirror group.
Background technology
In order to obtain the spectrum picture of multiple spectral coverage in light spectrum image-forming, need to add spectrum groupware between the imaging lens in light spectrum image-forming light path and photodetector, as optical filter, interferometer etc.Inventor finds in the process of research, can run into two problems when ordinary optical imaging system being upgraded to spectrum imaging system:
The back work distance of first problem imaging lens is inadequate, and the distance namely between the rearmost end of imaging lens and photodetector is too short, is not enough to place spectrum groupware.
Second Problem is not parallel light path between imaging lens and photodetector, the imaging performance of original imaging lens can be destroyed when the spectrum groupware such as optical filter or interferometer being placed wherein, be apparent that aberration the most, namely the imaging point position of the light of different wave length is inconsistent, thus lead spectrum picture and occur that obstructed spectral coverage image is inconsistent, affect light spectrum image-forming effect.
Although (the Fu Qiang etc. such as Fu Qiang, the relay imaging system design of optical spectrum imagers is crossed for liquid crystal tunable optical filtering flap-type, photon journal, 2011,31 (10), 1022002) a kind of relay imaging camera lens is devised, make camera lens back work distance long enough, spectrum groupware can be placed, front end can use the preposition imaging lens of different back work distance, but this method has only carried out aberration correction to camera lens self, but because spectrum groupware is still in non-parallel light path, spectrum groupware still can cause certain aberration, causes image quality to decline.
And for example (the Kohzo Homma such as Kohzo Homma, Hirokimi Shingu, HiromichiYamamoto.Application of an imaging spectropolarimeter to agro-environmentalsciences [J] .Proceedings of SPIE, 2004,5234:638 ~ 647) have employed a set of relay system, comprise two groups, front and back, in the parallel light path that spectrum groupware is placed between relay lens group, imaging performance can be made like this to improve.But because this relay lens have employed general camera lens, there will be the unmatched problem of optical parametric, image quality is difficult to control, and image planes brightness irregularities, still can produce comparatively serious aberration.
In other some designs, have employed the mode of relay lens group, but this relay lens group is only effective to preposition imaging lens supporting with it, when adopting other preposition imaging lens, image quality is just difficult to ensure.
Utility model content
In order to solve the problem, the utility model provides a kind of near infrared spectral coverage relay imaging mirror group, solves the problem that the image quality that is inadequate and that occur after inserting spectrum groupware of imaging lens back work distance in existing spectroscopic system declines.
A kind of near infrared spectral coverage relay imaging mirror group that the utility model provides, comprise the relay imaging mirror group be placed between the preposition imaging lens of light spectrum image-forming light path and photodetector, described relay imaging mirror group comprise be positioned at same optical axis and in specular arrange front arrangement of mirrors head and rear arrangement of mirrors head, described front arrangement of mirrors head and rear arrangement of mirrors head comprise first single eyeglass, first pair of cemented doublet, second pair of cemented doublet and second single eyeglass laterally successively by image side; Described first single eyeglass is the positive meniscus lens convex surface facing image side, and described first pair of cemented doublet is the eyeglass that biconvex lens and concave-concave eyeglass glue together; Described second pair of cemented doublet is the eyeglass that concave-concave eyeglass and biconvex eyeglass glue together, described second single eyeglass is the positive bent moon eyeglass convex surface facing image side, and the crowning radius of first single eyeglass in described relay imaging mirror group is 40mm, thickness is 6 ± 0.2mm, refractive index is 1.60881, scattering coefficient is 58.86; Second radius surface of first single eyeglass is plane, after airspace be 2 ± 0.02; The crowning radius of first pair of cemented doublet is 24.2mm, thickness is 8 ± 0.02mm, refractive index is 1.60881, scattering coefficient is 58.86; The radius of second of first pair of cemented doublet is-39.54mm, the radius of the 3rd that thickness is 3.57 ± 0.02mm, refractive index is 1.61242, scattering coefficient is 44.09, first pair of cemented doublet is 15.14mm, after airspace be 5 ± 0.02mm, the concave of second pair of cemented doublet is-42.1mm, thickness is 3.5 ± 0.02mm, refractive index is 1.61242, scattering coefficient is 44.09; The radius of second of second pair of cemented doublet is 17.86mm, the radius of the 3rd that thickness is 7 ± 0.02mm, refractive index is 1.60881, scattering coefficient is 56.86, second pair of cemented doublet is-190.69mm, airspace is the crowning radius of 43.4 ± 0.02mm and second single eyeglass is below 33mm, and the second radius surface that thickness is 5.3 ± 0.02mm, refractive index is 1.60881, scattering coefficient is 56.65, second single eyeglass is 130mm.
Further, the focal plane of described front arrangement of mirrors head overlaps with image planes of described preposition imaging lens imaging; The image planes of described rear arrangement of mirrors head overlap with the light-sensitive surface of described photodetector.
Further, be parallel light path between described front arrangement of mirrors head and rear arrangement of mirrors head, between described front arrangement of mirrors head and rear arrangement of mirrors head, be provided with the headspace placing spectrum groupware.
Further, the distance of the headspace between described front arrangement of mirrors head and rear arrangement of mirrors head is adjustable.
Further, described relay imaging mirror group is placed near infrared spectral range is 650 ~ 1100nm.
Further, the magnification of described relay imaging mirror group is 1, and linear field is ± 5.6mm, and is finite conjugate optical imaging lens group.
Further, described relay imaging mirror group is the heart design far away of the design of the object space heart far away and image space.
Described relay imaging mirror group, inside does not arrange diaphragm, and when mating with other preposition imaging lens, the diaphragm of preposition camera lens can move and the not serious image quality that affects within the specific limits, therefore can adapt to different preposition camera lenses;
Described relay imaging mirror group, two duplicate mirror groups combined, the optical relay system full symmetric after combination, vertical axial aberration cancels each other, and can improve relay lens group image quality further.
Described relay imaging mirror group, by suppressing second order spectrum in design, makes aberration reduce further, improves light spectrum image-forming quality.
Compared with prior art, the beneficial effects of the utility model are: can combinationally use from the preposition optical lens of different back work distance; Be parallel light path between relay imaging mirror group front lens group and rear mirror group, can place spectrum groupware, the distance between front lens group and rear mirror group can adjust flexibly according to the thickness of spectrum groupware; By suppressing second order spectrum, effectively reduce the aberration of system.Due to the design of the full symmetric of employing, front and rear mirror group only uses a kind of camera lens, and processing cost is lower, and assembling and setting is more prone to.
Accompanying drawing explanation
Fig. 1 is near infrared spectral coverage relay imaging mirror group schematic diagram;
Fig. 2 is for singly to organize schematic diagram;
Fig. 3 is the point range figure of near infrared spectral coverage relay imaging mirror group.
Embodiment
To further illustrate the utility model below:
As shown in Figure 1-2, a kind of near infrared spectral coverage relay imaging mirror group that the utility model embodiment provides, be preferably a kind of near infrared spectral coverage apochromatism relay imaging mirror group, comprise as the relay imaging mirror group between the preposition imaging lens in light spectrum image-forming light path and photodetector, described relay imaging mirror group comprise be positioned at same optical axis and in specular arrange front arrangement of mirrors head 1 and rear arrangement of mirrors head 2, described front arrangement of mirrors head 1 and rear arrangement of mirrors head 2 comprise first single eyeglass 11 laterally successively by image side, first pair of cemented doublet 12, second pair of cemented doublet 13 and second single eyeglass 14, described first single eyeglass 11 is the positive meniscus lens convex surface facing image side, and described first pair of cemented doublet 12 is the eyeglass that biconvex lens and concave-concave eyeglass glue together, described second pair of cemented doublet 13 is the eyeglass that concave-concave eyeglass and biconvex eyeglass glue together, and described second single eyeglass 14 is the positive bent moon eyeglass convex surface facing image side.
Further, the focal plane of described front arrangement of mirrors head 1 overlaps with image planes of described preposition imaging lens imaging; The image planes of described rear arrangement of mirrors head 2 overlap with the light-sensitive surface of described photodetector.
Further, be parallel light path between described front arrangement of mirrors head 1 and rear arrangement of mirrors head 2, between described front arrangement of mirrors head and rear arrangement of mirrors head, be provided with the headspace placing spectrum groupware 3.
Further, the distance of the headspace between described front arrangement of mirrors head 1 and rear arrangement of mirrors head 2 is adjustable.
The spectral range of embodiment one near infrared spectral coverage apochromatism relay imaging mirror group is the near infrared range of 650 ~ 1100nm;
The present embodiment glass material used is domestic common optical glass, and design parameter is as shown in the table:
The relay imaging mirror group magnification that the present embodiment completes is 1, and linear field is ± 5.6mm, and point range figure as shown in Figure 3.
Relay imaging mirror group in the present embodiment is the heart design far away of the design of the object space heart far away and image space.
Described relay imaging mirror group, inside does not arrange diaphragm, and when mating with other preposition imaging lens, the diaphragm of preposition camera lens can move and the not serious image quality that affects within the specific limits, therefore can adapt to different preposition camera lenses;
Described relay imaging mirror group, two duplicate mirror groups combined, the optical relay system full symmetric after combination, vertical axial aberration cancels each other, and can improve relay lens group image quality further.
Described relay imaging mirror group, by suppressing second order spectrum in design, makes aberration reduce further, improves light spectrum image-forming quality.
Described relay imaging mirror group, magnification is 1, is finite conjugate optical imaging lens group.
Compared with prior art, the beneficial effects of the utility model are: can combinationally use from the preposition optical lens of different back work distance; Be parallel light path between relay imaging mirror group front lens group and rear mirror group, can place spectrum groupware, the distance between front lens group and rear mirror group can adjust flexibly according to the thickness of spectrum groupware; By suppressing second order spectrum, effectively reduce the aberration of system.Due to the design of the full symmetric of employing, front and rear mirror group only uses a kind of camera lens, and processing cost is lower, and assembling and setting is more prone to.
Be only several specific embodiment of the present utility model above, but the utility model is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection domain of the present utility model.
Claims (7)
1. a near infrared spectral coverage relay imaging mirror group, comprise the relay imaging mirror group be placed between the preposition imaging lens of light spectrum image-forming light path and photodetector, it is characterized in that, described relay imaging mirror group comprise be positioned at same optical axis and in specular arrange front arrangement of mirrors head and rear arrangement of mirrors head, described front arrangement of mirrors head and rear arrangement of mirrors head comprise first single eyeglass, first pair of cemented doublet, second pair of cemented doublet and second single eyeglass laterally successively by image side; Described first single eyeglass is the positive meniscus lens convex surface facing image side, and described first pair of cemented doublet is the eyeglass that biconvex lens and concave-concave eyeglass glue together; Described second pair of cemented doublet is the eyeglass that concave-concave eyeglass and biconvex eyeglass glue together, described second single eyeglass is the positive bent moon eyeglass convex surface facing image side, and the crowning radius of first single eyeglass in described relay imaging mirror group is 40mm, thickness is 6 ± 0.2mm, refractive index is 1.60881, scattering coefficient is 58.86; Second radius surface of first single eyeglass is plane, after airspace be 2 ± 0.02; The crowning radius of first pair of cemented doublet is 24.2mm, thickness is 8 ± 0.02mm, refractive index is 1.60881, scattering coefficient is 58.86; The radius of second of first pair of cemented doublet is-39.54mm, the radius of the 3rd that thickness is 3.57 ± 0.02mm, refractive index is 1.61242, scattering coefficient is 44.09, first pair of cemented doublet is 15.14mm, after airspace be 5 ± 0.02mm, the concave of second pair of cemented doublet is-42.1mm, thickness is 3.5 ± 0.02mm, refractive index is 1.61242, scattering coefficient is 44.09; The radius of second of second pair of cemented doublet is 17.86mm, the radius of the 3rd that thickness is 7 ± 0.02mm, refractive index is 1.60881, scattering coefficient is 56.86, second pair of cemented doublet is-190.69mm, airspace is the crowning radius of 43.4 ± 0.02mm and second single eyeglass is below 33mm, and the second radius surface that thickness is 5.3 ± 0.02mm, refractive index is 1.60881, scattering coefficient is 56.65, second single eyeglass is 130mm.
2. near infrared spectral coverage relay imaging mirror group as claimed in claim 1, it is characterized in that, the focal plane of described front arrangement of mirrors head overlaps with image planes of described preposition imaging lens imaging; The image planes of described rear arrangement of mirrors head overlap with the light-sensitive surface of described photodetector.
3. near infrared spectral coverage relay imaging mirror group as claimed in claim 1, it is characterized in that, be parallel light path between described front arrangement of mirrors head and rear arrangement of mirrors head, is provided with the headspace placing spectrum groupware between described front arrangement of mirrors head and rear arrangement of mirrors head.
4. near infrared spectral coverage relay imaging mirror group as claimed in claim 3, it is characterized in that, the distance of the headspace between described front arrangement of mirrors head and rear arrangement of mirrors head is adjustable.
5. near infrared spectral coverage relay imaging mirror group as claimed in claim 1, is characterized in that, the near infrared spectral range of described relay imaging mirror group application is 650 ~ 1100nm.
6. near infrared spectral coverage relay imaging mirror group as claimed in claim 5, it is characterized in that, the magnification of described relay imaging mirror group is 1, and linear field is ± 5.6mm, and is finite conjugate optical imaging lens group.
7. near infrared spectral coverage relay imaging mirror group as claimed in claim 1, is characterized in that, described relay imaging mirror group is the heart design far away of the design of the object space heart far away and image space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420738301.XU CN204256249U (en) | 2014-11-28 | 2014-11-28 | A kind of near infrared spectral coverage relay imaging mirror group |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420738301.XU CN204256249U (en) | 2014-11-28 | 2014-11-28 | A kind of near infrared spectral coverage relay imaging mirror group |
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| Publication Number | Publication Date |
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| CN204256249U true CN204256249U (en) | 2015-04-08 |
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| CN201420738301.XU Withdrawn - After Issue CN204256249U (en) | 2014-11-28 | 2014-11-28 | A kind of near infrared spectral coverage relay imaging mirror group |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104536118A (en) * | 2014-11-28 | 2015-04-22 | 青岛市光电工程技术研究院 | Near-infrared spectral relay imaging lens group |
-
2014
- 2014-11-28 CN CN201420738301.XU patent/CN204256249U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104536118A (en) * | 2014-11-28 | 2015-04-22 | 青岛市光电工程技术研究院 | Near-infrared spectral relay imaging lens group |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150408 Effective date of abandoning: 20171114 |
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| AV01 | Patent right actively abandoned |