CN111338078B - Few-pixel optical imaging system - Google Patents

Few-pixel optical imaging system Download PDF

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CN111338078B
CN111338078B CN202010300561.9A CN202010300561A CN111338078B CN 111338078 B CN111338078 B CN 111338078B CN 202010300561 A CN202010300561 A CN 202010300561A CN 111338078 B CN111338078 B CN 111338078B
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mirror surface
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micro lens
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CN111338078A (en
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苏云
焦建超
葛婧菁
俞越
李瀛搏
韩潇
王超
吕红
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Beijing Institute of Space Research Mechanical and Electricity
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Beijing Institute of Space Research Mechanical and Electricity
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
    • G01J1/0411—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings using focussing or collimating elements, i.e. lenses or mirrors; Aberration correction
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
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Abstract

The invention discloses a few-pixel optical imaging system, which comprises: the optical lens comprises a first tiny lens array, a second tiny lens array, a third tiny lens array and an aberration calibration lens group; the light rays of the first field, the light rays of the second field, the light rays of the third field, the light rays of the fourth field and the light rays of the fifth field sequentially pass through the first micro lens array, the second micro lens array, the third micro lens array and the aberration calibration lens group respectively to obtain first aberration correction light rays, second aberration correction light rays, third aberration correction light rays, fourth aberration correction light rays and fifth aberration correction light rays, and the first aberration correction light rays, the second aberration correction light rays, the third aberration correction light rays, the fourth aberration correction light rays and the fifth aberration correction light rays form a secondary rectangular image surface. The invention converges the light of the long linear primary image surface to form a rectangular secondary image surface, and the photoelectric conversion can be completed only by a common area array detector, so that the large-field-of-view imaging system can be realized.

Description

Few-pixel optical imaging system
Technical Field
The invention belongs to the technical field of optical imaging systems, and particularly relates to a few-pixel optical imaging system.
Background
With the continuous enrichment of application fields, the demand for large-field-of-view optical systems is increasing at present, which not only increases the design difficulty of the optical systems, but also increases the demand for large-area or long-line array detectors, and especially for push-broom imaging systems, ultra-long line array detectors are required. Although this problem can be solved by developing a detector with a larger number of pixels, or by using detector stitching techniques, the development and stitching of detectors usually requires multiple professionals to accomplish together. Huge manpower and material costs are added to the whole system. This problem is solved by changing the design of the optical system, for example, by reducing the focal length of the system, which reduces the size of the phase plane under the same field of view, but the resolution of the system is also reduced, which may not be satisfactory for the application.
Disclosure of Invention
The technical problem solved by the invention is as follows: the defects of the prior art are overcome, the few-pixel optical imaging system is provided, the secondary image surface rearrangement optical system is added behind the original primary image surface, light rays of the long-line-shaped primary image surface are converged again to form the rectangular secondary image surface, and at the moment, photoelectric conversion can be completed only by the commonly-used area array detector, so that the large-view-field imaging system can be realized.
The purpose of the invention is realized by the following technical scheme: a low-pixel optical imaging system, comprising: the optical lens comprises a first micro lens array, a second micro lens array, a third micro lens array and an aberration calibration lens group; the incident light passes through the image surface for one time and is divided into light of a first view field, light of a second view field, light of a third view field, light of a fourth view field and light of a fifth view field; the light rays of the first field, the light rays of the second field, the light rays of the third field, the light rays of the fourth field and the light rays of the fifth field sequentially pass through the first micro lens array, the second micro lens array, the third micro lens array and the aberration calibration lens group respectively to obtain first aberration correction light rays, second aberration correction light rays, third aberration correction light rays, fourth aberration correction light rays and fifth aberration correction light rays, and the first aberration correction light rays, the second aberration correction light rays, the third aberration correction light rays, the fourth aberration correction light rays and the fifth aberration correction light rays form a secondary rectangular image surface; wherein, the primary image surface is in a long linear array type.
In the few-pixel optical imaging system, the first micro lens array comprises a first micro lens (1-1), a fourth micro lens (1-2), a seventh micro lens (1-3), a tenth micro lens (1-4) and a thirteenth micro lens (1-5); the second micro lens array comprises a second micro lens (2-1), a fifth micro lens (2-2), an eighth micro lens (2-3), an eleventh micro lens (2-4) and a fourteenth micro lens (2-5); the third micro lens array comprises a third micro lens (3-1), a sixth micro lens (3-2), a ninth micro lens (3-3), a twelfth micro lens (3-4) and a fifteenth micro lens (3-5); the aberration calibration lens group comprises a first lens (4), a second lens (5), a third lens (6) and a fourth lens (7); the light of the first field of view sequentially passes through a first tiny lens (1-1), a second tiny lens (2-1) and a third tiny lens (3-1), and then sequentially passes through a first lens (4), a second lens (5), a third lens (6) and a fourth lens (7) to obtain first aberration correction light; the light of the second field of view sequentially passes through a fourth micro lens (1-2), a fifth micro lens (2-2) and a sixth micro lens (3-2), and then sequentially passes through a first lens (4), a second lens (5), a third lens (6) and a fourth lens (7) to obtain second aberration correction light; the light of the third field of view sequentially passes through a seventh tiny lens (1-3), an eighth tiny lens (2-3) and a ninth tiny lens (3-3), and then sequentially passes through a first lens (4), a second lens (5), a third lens (6) and a fourth lens (7) to obtain third aberration correction light; the light of the fourth field of view sequentially passes through tenth micro lenses (1-4), eleventh micro lenses (2-4) and twelfth micro lenses (3-4), and then sequentially passes through the first lens (4), the second lens (5), the third lens (6) and the fourth lens (7) to obtain fourth aberration correction light; the light of the fifth field of view sequentially passes through a thirteenth micro lens (1-5), a fourteenth micro lens (2-5) and a fifteenth micro lens (3-5), and then sequentially passes through a first lens (4), a second lens (5), a third lens (6) and a fourth lens (7) to obtain a fifth aberration correction light; the first aberration correction light ray, the second aberration correction light ray, the third aberration correction light ray, the fourth aberration correction light ray and the fifth aberration correction light ray form a secondary rectangular image surface.
In the few-pixel optical imaging system, the distance between a primary image surface and a left mirror surface of a first micro lens (1-1) is 10mm, the curvature radius of the left mirror surface of the first micro lens (1-1) is-27.4 mm, the curvature radius of a right mirror surface of the first micro lens (1-1) is-30.9 mm, the thickness of the first micro lens (1-1) is 10mm, the distance between the right mirror surface of the first micro lens (1-1) and the left mirror surface of a second micro lens (2-1) is 19.8mm, the clear aperture of the left mirror surface of the first micro lens (1-1) is 8.8mm, and the clear aperture of the right mirror surface of the first micro lens (1-1) is 11.6 mm; the curvature radius of the left mirror surface of the fourth micro lens (1-2) is-27.6 mm, the curvature radius of the right mirror surface of the fourth micro lens (1-2) is-30.9 mm, the thickness of the fourth micro lens (1-2) is 10mm, the distance between the right mirror surface of the fourth micro lens (1-2) and the left mirror surface of the fifth micro lens (2-2) is 19.8mm, the clear aperture of the left mirror surface of the fourth micro lens (1-2) is 8.5mm, and the clear aperture of the right mirror surface of the fourth micro lens (1-2) is 11.1 mm; the curvature radius of the left mirror surface of the seventh micro lens (1-3) is-27.6 mm, the curvature radius of the right mirror surface of the seventh micro lens (1-3) is-30.9 mm, the thickness of the seventh micro lens (1-3) is 10mm, the distance between the right mirror surface of the seventh micro lens (1-3) and the left mirror surface of the eighth micro lens (2-3) is 19.8mm, the clear aperture of the left mirror surface of the seventh micro lens (1-3) is 8.2mm, and the clear aperture of the right mirror surface of the seventh micro lens (1-3) is 10.7 mm; the curvature radius of the left mirror surface of the tenth micro lens (1-4) is-27.6 mm, the curvature radius of the right mirror surface of the tenth micro lens (1-4) is-30.9 mm, the thickness of the tenth micro lens (1-4) is 10mm, the distance between the right mirror surface of the tenth micro lens (1-4) and the left mirror surface of the eleventh micro lens (2-4) is 19.8mm, the clear aperture of the left mirror surface of the tenth micro lens (1-4) is 8.5mm, and the clear aperture of the right mirror surface of the tenth micro lens (1-4) is 11.1 mm; the curvature radius of the left mirror surface of the thirteenth micro lens (1-5) is-27.6 mm, the curvature radius of the right mirror surface of the thirteenth micro lens (1-5) is-30.9 mm, the thickness of the thirteenth micro lens (1-5) is 10mm, the distance between the right mirror surface of the thirteenth micro lens (1-5) and the left mirror surface of the fourteenth micro lens (2-5) is 19.8mm, the clear aperture of the left mirror surface of the thirteenth micro lens (1-5) is 8.8mm, and the clear aperture of the right mirror surface of the thirteenth micro lens (1-5) is 11.6 mm.
In the few-pixel optical imaging system, the curvature radius of the left mirror surface of the second micro lens (2-1) is-299.1 mm, the curvature radius of the right mirror surface of the second micro lens (2-1) is 153.9mm, the thickness of the second micro lens (2-1) is 10mm, the distance between the right mirror surface of the second micro lens (2-1) and the left mirror surface of the third micro lens (3-1) is 4.4mm, the clear aperture of the left mirror surface of the second micro lens (2-1) is 13.4mm, and the clear aperture of the right mirror surface of the second micro lens (2-1) is 14.1 mm; the curvature radius of the left mirror surface of the fifth micro lens (2-2) is-299.1 mm, the curvature radius of the right mirror surface of the fifth micro lens (2-2) is 153.9mm, the thickness of the fifth micro lens (2-2) is 10mm, the distance between the right mirror surface of the fifth micro lens (2-2) and the left mirror surface of the sixth micro lens (3-2) is 4.4mm, the clear aperture of the left mirror surface of the fifth micro lens (2-2) is 12.4mm, and the clear aperture of the right mirror surface of the fifth micro lens (2-2) is 14.9 mm; the curvature radius of the left mirror surface of the eighth micro lens (2-3) is-299.1 mm, the curvature radius of the right mirror surface of the eighth micro lens (2-3) is 153.9mm, the thickness of the eighth micro lens (2-3) is 10mm, the distance between the right mirror surface of the eighth micro lens (2-3) and the left mirror surface of the ninth micro lens (3-3) is 4.4mm, the clear aperture of the left mirror surface of the eighth micro lens (2-3) is 11.4mm, and the clear aperture of the right mirror surface of the eighth micro lens (2-3) is 11.8 mm; the curvature radius of the left mirror surface of the eleventh micro lens (2-4) is-299.1 mm, the curvature radius of the right mirror surface of the eleventh micro lens (2-4) is 153.9mm, the thickness of the eleventh micro lens (2-4) is 10mm, the distance between the right mirror surface of the eleventh micro lens (2-4) and the left mirror surface of the twelfth micro lens (3-4) is 4.4mm, the clear aperture of the left mirror surface of the eleventh micro lens (2-4) is 12.4mm, and the clear aperture of the right mirror surface of the eleventh micro lens (2-4) is 12.9 mm; the curvature radius of the left mirror surface of the fourteenth micro lens (2-5) is-299.1 mm, the curvature radius of the right mirror surface of the fourteenth micro lens (2-5) is 153.9mm, the thickness of the fourteenth micro lens (2-5) is 10mm, the distance between the right mirror surface of the fourteenth micro lens (2-5) and the left mirror surface of the fifteenth micro lens (3-5) is 4.4mm, the clear aperture of the left mirror surface of the fourteenth micro lens (2-5) is 12.4mm, and the clear aperture of the right mirror surface of the fourteenth micro lens (2-5) is 12.9 mm.
In the few-pixel optical imaging system, the curvature radius of the left mirror surface of the third micro lens (3-1) is 653.6mm, the curvature radius of the right mirror surface of the third micro lens (3-1) is-71.9 mm, the thickness of the third micro lens (3-1) is 9.99mm, the distance between the right mirror surface of the third micro lens (3-1) and the left mirror surface of the first lens (4) is 40mm, the clear aperture of the left mirror surface of the third micro lens (3-1) is 16.3mm, and the clear aperture of the right mirror surface of the third micro lens (3-1) is 17.3 mm; the curvature radius of the left mirror surface of the sixth micro lens (3-2) is 653.6mm, the curvature radius of the right mirror surface of the sixth micro lens (3-2) is-71.9 mm, the thickness of the sixth micro lens (3-2) is 9.99mm, the distance between the right mirror surface of the sixth micro lens (3-2) and the left mirror surface of the first lens (4) is 40mm, the clear aperture of the left mirror surface of the sixth micro lens (3-2) is 14.9mm, and the clear aperture of the right mirror surface of the sixth micro lens (3-2) is 15.8 mm; the curvature radius of the left mirror surface of the ninth micro lens (3-3) is 653.6mm, the curvature radius of the right mirror surface of the ninth micro lens (3-3) is-71.9 mm, the thickness of the ninth micro lens (3-3) is 9.99mm, the distance between the right mirror surface of the ninth micro lens (3-3) and the left mirror surface of the first lens (4) is 40mm, the clear aperture of the left mirror surface of the ninth micro lens (3-3) is 13.5mm, and the clear aperture of the right mirror surface of the ninth micro lens (3-3) is 14.3 mm; the curvature radius of the left mirror surface of the twelfth micro lens (3-4) is 653.6mm, the curvature radius of the right mirror surface of the twelfth micro lens (3-4) is-71.9 mm, the thickness of the twelfth micro lens (3-4) is 9.99mm, the distance between the right mirror surface of the twelfth micro lens (3-4) and the left mirror surface of the first lens (4) is 40mm, the clear aperture of the left mirror surface of the twelfth micro lens (3-4) is 14.9mm, and the clear aperture of the right mirror surface of the twelfth micro lens (3-4) is 15.8 mm; the curvature radius of the left mirror surface of the fifteenth micro lens (3-5) is 653.6mm, the curvature radius of the right mirror surface of the fifteenth micro lens (3-5) is-71.9 mm, the thickness of the fifteenth micro lens (3-5) is 9.99mm, the distance between the right mirror surface of the fifteenth micro lens (3-5) and the left mirror surface of the first lens (4) is 40mm, the clear aperture of the left mirror surface of the fifteenth micro lens (3-5) is 16.3mm, and the clear aperture of the right mirror surface of the fifteenth micro lens (3-5) is 17.3 mm.
In the few-pixel optical imaging system, the curvature radius of the left mirror surface of the first lens (4) is 70.3mm, the curvature radius of the right mirror surface of the first lens (4) is 146.8mm, the thickness of the first lens (4) is 9.99mm, the distance between the right mirror surface of the first lens (4) and the left mirror surface of the second lens (5) is 15.2mm, the clear aperture of the left mirror surface of the first lens (4) is 40mm, and the clear aperture of the right mirror surface of the first lens (4) is 40 mm.
In the few-pixel optical imaging system, the curvature radius of the left mirror surface of the second lens (5) is-106.6 mm, the curvature radius of the right mirror surface of the second lens (5) is-112 mm, the thickness of the second lens (5) is 8.2mm, the distance between the right mirror surface of the second lens (5) and the left mirror surface of the third lens (6) is 0.7mm, the clear aperture of the left mirror surface of the second lens (5) is 40mm, and the clear aperture of the right mirror surface of the second lens (5) is 40 mm.
In the few-pixel optical imaging system, the curvature radius of the left mirror surface of the third lens (6) is-93.7 mm, the curvature radius of the right mirror surface of the third lens (6) is-132.1 mm, the thickness of the third lens (6) is 7.2mm, the distance between the right mirror surface of the third lens (6) and the left mirror surface of the fourth lens (7) is 29mm, the clear aperture of the left mirror surface of the third lens (6) is 35mm, and the clear aperture of the right mirror surface of the third lens (6) is 35 mm.
In the few-pixel optical imaging system, the curvature radius of the left mirror surface of the fourth lens (7) is 25.1mm, the curvature radius of the right mirror surface of the fourth lens (7) is 23.1mm, the thickness of the fourth lens (7) is 10.2mm, the distance between the right mirror surface of the fourth lens (7) and the quadratic rectangular image surface is 4.2mm, the clear aperture of the left mirror surface of the fourth lens (7) is 20mm, and the clear aperture of the right mirror surface of the fourth lens (7) is 20 mm.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention changes the detector needed by the large-field-of-view optical system from a long linear array detector to a conventional area array detector, greatly reduces the requirements on the detector, and has richer selectable detector types. While also reducing the cost required to customize the detector.
(2) Due to the abundance of selectable detector types and the introduction of a two-stage image plane rearrangement optical system, the design of a conventional optical system before a primary image plane has greater freedom, and other indexes such as aberration and the like can be further optimized under the condition of not reducing a field of view. Meanwhile, the design of the optical system is more flexible, so that the whole optical system with a large field of view can be applied to more fields.
(3) The invention can further reduce the aberration of the system by using the optical system after the primary image surface, thereby improving the imaging quality. Particularly, because the newly added secondary image plane rearrangement group is designed for each small part of the primary image plane, the aberration of each part can be reduced as much as possible, namely, the large field of view is divided into a plurality of continuous small fields of view, and the aberration of each small field of view is optimized. And finally, balancing the integral aberration through the common lens group. Therefore, the resulting aberrations are superior to conventional large field optical systems.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic diagram of a low pixel optical imaging system provided by an embodiment of the invention;
FIG. 2 is a schematic optical path diagram of a two-level image plane rearrangement optical system unit provided by the embodiment of the present invention;
FIG. 3 is another schematic optical path diagram of the two-stage image plane rearrangement optical system unit provided by the embodiment of the present invention;
FIG. 4 is a schematic diagram of another optical path of the two-level image plane rearrangement optical system unit provided by the embodiment of the present invention;
FIG. 5 is a schematic diagram of a conventional optical system plus a low-pixel optical imaging system provided by an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
FIG. 1 is a schematic diagram of a low pixel optical imaging system provided by an embodiment of the invention; FIG. 2 is a schematic optical path diagram of a two-level image plane rearrangement optical system unit provided by the embodiment of the present invention; FIG. 3 is another schematic optical path diagram of the two-stage image plane rearrangement optical system unit provided by the embodiment of the present invention; fig. 4 is a schematic diagram of another optical path of the two-level image plane rearrangement optical system unit provided by the embodiment of the invention.
As shown in fig. 1 to 4, the image element-less optical imaging system includes a first microlens array, a second microlens array, a third microlens array and an aberration calibration lens group; wherein,
the incident light passes through the primary image surface and is divided into light of a first view field, light of a second view field, light of a third view field, light of a fourth view field and light of a fifth view field;
the light rays of the first field, the light rays of the second field, the light rays of the third field, the light rays of the fourth field and the light rays of the fifth field sequentially pass through the first micro lens array, the second micro lens array, the third micro lens array and the aberration calibration lens group respectively to obtain first aberration correction light rays, second aberration correction light rays, third aberration correction light rays, fourth aberration correction light rays and fifth aberration correction light rays, and the first aberration correction light rays, the second aberration correction light rays, the third aberration correction light rays, the fourth aberration correction light rays and the fifth aberration correction light rays form a secondary rectangular image surface; wherein, the primary image surface is in a long linear array type.
The first micro lens array comprises a first micro lens 1-1, a fourth micro lens 1-2, a seventh micro lens 1-3, a tenth micro lens 1-4 and a thirteenth micro lens 1-5;
the second micro lens array includes a second micro lens 2-1, a fifth micro lens 2-2, an eighth micro lens 2-3, an eleventh micro lens 2-4 and a fourteenth micro lens 2-5;
the third micro lens array comprises a third micro lens 3-1, a sixth micro lens 3-2, a ninth micro lens 3-3, a twelfth micro lens 3-4 and a fifteenth micro lens 3-5;
the aberration correcting lens group comprises a first lens 4, a second lens 5, a third lens 6 and a fourth lens 7;
the light of the first field of view sequentially passes through a first tiny lens 1-1, a second tiny lens 2-1 and a third tiny lens 3-1, and then sequentially passes through a first lens 4, a second lens 5, a third lens 6 and a fourth lens 7 to obtain first aberration correction light;
the light of the second field of view sequentially passes through a fourth micro lens 1-2, a fifth micro lens 2-2 and a sixth micro lens 3-2, and then sequentially passes through a first lens 4, a second lens 5, a third lens 6 and a fourth lens 7 to obtain second aberration correction light;
the light of the third field of view sequentially passes through a seventh tiny lens 1-3, an eighth tiny lens 2-3 and a ninth tiny lens 3-3, and then sequentially passes through a first lens 4, a second lens 5, a third lens 6 and a fourth lens 7 to obtain third aberration correction light;
light rays of a fourth field of view sequentially pass through a tenth micro lens 1-4, an eleventh micro lens 2-4 and a twelfth micro lens 3-4, and then sequentially pass through a first lens 4, a second lens 5, a third lens 6 and a fourth lens 7 to obtain fourth aberration correction light rays;
the light rays of the fifth field of view sequentially pass through a thirteenth micro lens 1-5, a fourteenth micro lens 2-5 and a fifteenth micro lens 3-5, and then sequentially pass through a first lens 4, a second lens 5, a third lens 6 and a fourth lens 7 to obtain fifth aberration correction light rays;
the first aberration correction light ray, the second aberration correction light ray, the third aberration correction light ray, the fourth aberration correction light ray and the fifth aberration correction light ray form a secondary rectangular image surface.
The distance between the primary image surface and the left mirror surface of the first micro lens 1-1 is 10mm, the curvature radius of the left mirror surface of the first micro lens 1-1 is-27.4 mm, the curvature radius of the right mirror surface of the first micro lens 1-1 is-30.9 mm, the thickness of the first micro lens 1-1 is 10mm, the distance between the right mirror surface of the first micro lens 1-1 and the left mirror surface of the second micro lens 2-1 is 19.8mm, the clear aperture of the left mirror surface of the first micro lens 1-1 is 8.8mm, and the clear aperture of the right mirror surface of the first micro lens 1-1 is 11.6 mm;
the curvature radius of the left mirror surface of the fourth micro lens 1-2 is-27.6 mm, the curvature radius of the right mirror surface of the fourth micro lens 1-2 is-30.9 mm, the thickness of the fourth micro lens 1-2 is 10mm, the distance between the right mirror surface of the fourth micro lens 1-2 and the left mirror surface of the fifth micro lens 2-2 is 19.8mm, the clear aperture of the left mirror surface of the fourth micro lens 1-2 is 8.5mm, and the clear aperture of the right mirror surface of the fourth micro lens 1-2 is 11.1 mm;
the curvature radius of the left mirror surface of the seventh micro lens 1-3 is-27.6 mm, the curvature radius of the right mirror surface of the seventh micro lens 1-3 is-30.9 mm, the thickness of the seventh micro lens 1-3 is 10mm, the distance between the right mirror surface of the seventh micro lens 1-3 and the left mirror surface of the eighth micro lens 2-3 is 19.8mm, the clear aperture of the left mirror surface of the seventh micro lens 1-3 is 8.2mm, and the clear aperture of the right mirror surface of the seventh micro lens 1-3 is 10.7 mm;
the curvature radius of the left mirror surface of the tenth micro lens 1-4 is-27.6 mm, the curvature radius of the right mirror surface of the tenth micro lens 1-4 is-30.9 mm, the thickness of the tenth micro lens 1-4 is 10mm, the distance between the right mirror surface of the tenth micro lens 1-4 and the left mirror surface of the eleventh micro lens 2-4 is 19.8mm, the clear aperture of the left mirror surface of the tenth micro lens 1-4 is 8.5mm, and the clear aperture of the right mirror surface of the tenth micro lens 1-4 is 11.1 mm;
the curvature radius of the left mirror surface of the thirteenth micro lens 1-5 is-27.6 mm, the curvature radius of the right mirror surface of the thirteenth micro lens 1-5 is-30.9 mm, the thickness of the thirteenth micro lens 1-5 is 10mm, the distance between the right mirror surface of the thirteenth micro lens 1-5 and the left mirror surface of the fourteenth micro lens 2-5 is 19.8mm, the clear aperture of the left mirror surface of the thirteenth micro lens 1-5 is 8.8mm, and the clear aperture of the right mirror surface of the thirteenth micro lens 1-5 is 11.6 mm;
the curvature radius of the left mirror surface of the second micro lens 2-1 is-299.1 mm, the curvature radius of the right mirror surface of the second micro lens 2-1 is 153.9mm, the thickness of the second micro lens 2-1 is 10mm, the distance between the right mirror surface of the second micro lens 2-1 and the left mirror surface of the third micro lens 3-1 is 4.4mm, the clear aperture of the left mirror surface of the second micro lens 2-1 is 13.4mm, and the clear aperture of the right mirror surface of the second micro lens 2-1 is 14.1 mm;
the curvature radius of the left mirror surface of the fifth micro lens 2-2 is-299.1 mm, the curvature radius of the right mirror surface of the fifth micro lens 2-2 is 153.9mm, the thickness of the fifth micro lens 2-2 is 10mm, the distance between the right mirror surface of the fifth micro lens 2-2 and the left mirror surface of the sixth micro lens 3-2 is 4.4mm, the clear aperture of the left mirror surface of the fifth micro lens 2-2 is 12.4mm, and the clear aperture of the right mirror surface of the fifth micro lens 2-2 is 14.9 mm;
the curvature radius of the left mirror surface of the eighth microlens 2-3 is-299.1 mm, the curvature radius of the right mirror surface of the eighth microlens 2-3 is 153.9mm, the thickness of the eighth microlens 2-3 is 10mm, the distance between the right mirror surface of the eighth microlens 2-3 and the left mirror surface of the ninth microlens 3-3 is 4.4mm, the clear aperture of the left mirror surface of the eighth microlens 2-3 is 11.4mm, and the clear aperture of the right mirror surface of the eighth microlens 2-3 is 11.8 mm;
the curvature radius of the left mirror surface of the eleventh micro lens 2-4 is-299.1 mm, the curvature radius of the right mirror surface of the eleventh micro lens 2-4 is 153.9mm, the thickness of the eleventh micro lens 2-4 is 10mm, the distance between the right mirror surface of the eleventh micro lens 2-4 and the left mirror surface of the twelfth micro lens 3-4 is 4.4mm, the clear aperture of the left mirror surface of the eleventh micro lens 2-4 is 12.4mm, and the clear aperture of the right mirror surface of the eleventh micro lens 2-4 is 12.9 mm;
the curvature radius of the left mirror surface of the fourteenth micro lens 2-5 is-299.1 mm, the curvature radius of the right mirror surface of the fourteenth micro lens 2-5 is 153.9mm, the thickness of the fourteenth micro lens 2-5 is 10mm, the distance between the right mirror surface of the fourteenth micro lens 2-5 and the left mirror surface of the fifteenth micro lens 3-5 is 4.4mm, the clear aperture of the left mirror surface of the fourteenth micro lens 2-5 is 12.4mm, and the clear aperture of the right mirror surface of the fourteenth micro lens 2-5 is 12.9 mm;
the curvature radius of the left mirror surface of the third micro lens 3-1 is 653.6mm, the curvature radius of the right mirror surface of the third micro lens 3-1 is-71.9 mm, the thickness of the third micro lens 3-1 is 9.99mm, the distance between the right mirror surface of the third micro lens 3-1 and the left mirror surface of the first lens 4 is 40mm, the clear aperture of the left mirror surface of the third micro lens 3-1 is 16.3mm, and the clear aperture of the right mirror surface of the third micro lens 3-1 is 17.3 mm;
the curvature radius of the left mirror surface of the sixth micro lens 3-2 is 653.6mm, the curvature radius of the right mirror surface of the sixth micro lens 3-2 is-71.9 mm, the thickness of the sixth micro lens 3-2 is 9.99mm, the distance between the right mirror surface of the sixth micro lens 3-2 and the left mirror surface of the first lens 4 is 40mm, the clear aperture of the left mirror surface of the sixth micro lens 3-2 is 14.9mm, and the clear aperture of the right mirror surface of the sixth micro lens 3-2 is 15.8 mm;
the curvature radius of the left mirror surface of the ninth micro lens 3-3 is 653.6mm, the curvature radius of the right mirror surface of the ninth micro lens 3-3 is-71.9 mm, the thickness of the ninth micro lens 3-3 is 9.99mm, the distance between the right mirror surface of the ninth micro lens 3-3 and the left mirror surface of the first lens 4 is 40mm, the clear aperture of the left mirror surface of the ninth micro lens 3-3 is 13.5mm, and the clear aperture of the right mirror surface of the ninth micro lens 3-3 is 14.3 mm;
the curvature radius of the left mirror surface of the twelfth micro lens 3-4 is 653.6mm, the curvature radius of the right mirror surface of the twelfth micro lens 3-4 is-71.9 mm, the thickness of the twelfth micro lens 3-4 is 9.99mm, the distance between the right mirror surface of the twelfth micro lens 3-4 and the left mirror surface of the first lens 4 is 40mm, the clear aperture of the left mirror surface of the twelfth micro lens 3-4 is 14.9mm, and the clear aperture of the right mirror surface of the twelfth micro lens 3-4 is 15.8 mm;
the curvature radius of the left mirror surface of the fifteenth micro lens 3-5 is 653.6mm, the curvature radius of the right mirror surface of the fifteenth micro lens 3-5 is-71.9 mm, the thickness of the fifteenth micro lens 3-5 is 9.99mm, the distance between the right mirror surface of the fifteenth micro lens 3-5 and the left mirror surface of the first lens 4 is 40mm, the clear aperture of the left mirror surface of the fifteenth micro lens 3-5 is 16.3mm, and the clear aperture of the right mirror surface of the fifteenth micro lens 3-5 is 17.3 mm;
the curvature radius of the left mirror surface of the first lens 4 is 70.3mm, the curvature radius of the right mirror surface of the first lens 4 is 146.8mm, the thickness of the first lens 4 is 9.99mm, the distance between the right mirror surface of the first lens 4 and the left mirror surface of the second lens 5 is 15.2mm, the clear aperture of the left mirror surface of the first lens 4 is 40mm, and the clear aperture of the right mirror surface of the first lens 4 is 40 mm;
the curvature radius of the left mirror surface of the second lens 5 is-106.6 mm, the curvature radius of the right mirror surface of the second lens 5 is-112 mm, the thickness of the second lens 5 is 8.2mm, the distance between the right mirror surface of the second lens 5 and the left mirror surface of the third lens 6 is 0.7mm, the clear aperture of the left mirror surface of the second lens 5 is 40mm, and the clear aperture of the right mirror surface of the second lens 5 is 40 mm;
the curvature radius of the left mirror surface of the third lens 6 is-93.7 mm, the curvature radius of the right mirror surface of the third lens 6 is-132.1 mm, the thickness of the third lens 6 is 7.2mm, the distance between the right mirror surface of the third lens 6 and the left mirror surface of the fourth lens 7 is 29mm, the clear aperture of the left mirror surface of the third lens 6 is 35mm, and the clear aperture of the right mirror surface of the third lens 6 is 35 mm;
the curvature radius of the left mirror surface of the fourth lens 7 is 25.1mm, the curvature radius of the right mirror surface of the fourth lens 7 is 23.1mm, the thickness of the fourth lens 7 is 10.2mm, the distance between the right mirror surface of the fourth lens 7 and the secondary rectangular image surface is 4.2mm, the clear aperture of the left mirror surface of the fourth lens 7 is 20mm, and the clear aperture of the right mirror surface of the fourth lens 7 is 20 mm.
The working principle is as follows: the primary image surface is in a long linear array type, the primary image surface is divided into five parts according to different imaging positions of different fields, each part comprises light rays of a corresponding field, and the light rays form a secondary rectangular image surface after passing through a corresponding tiny lens group and an aberration calibration lens group, so that the requirement of an optical system on a detector is lowered, and the design of the optical system with a larger field is facilitated.
The light rays propagate along straight lines in the propagation process of each lens, enter different media and follow the law of refraction: n is 1 sinθ 1 ＝n 2 sinθ 2 The optical element parameters are shown in the following table:
Figure BDA0002453825480000121
Figure BDA0002453825480000131
FIG. 5 is a schematic diagram of a conventional optical system plus a low-pixel optical imaging system provided by an embodiment of the present invention. As shown in fig. 5, the two-stage image plane rearrangement optical system is disposed between the conventional optical system and the detector; the light rays are converged to form a primary image after passing through a traditional optical system, each part of the primary image surface corresponds to one group of secondary image surface rearrangement groups, and the light rays of the part are converged again to form a secondary image surface; and the detector module receives the light rays at the secondary image surface for photoelectric conversion to obtain a final image.
The conventional optical system is a classical optical system frequently applied in engineering, such as an off-axis three-mirror system. For these conventional optical systems, when the required field of view is continuously increased, the area of the primary image plane is also continuously increased, and a long line shape is gradually formed, so that a linear array detector with a large number of pixels needs to be customized to complete photoelectric conversion, and the difficulty and cost in developing the whole system are increased.
The secondary image surface rearrangement optical system is designed for each part of the primary image surface independently, light rays behind the primary image surface are converged respectively, and finally aberration of each part is reduced again through the common lens group to form a secondary image surface. Compared with the long linear shape of the primary image surface, the secondary image surface is changed into a rectangular image surface, and photoelectric conversion can be completed only by a conventional area array detector.
As shown in fig. 5, the primary image plane formed by converging light rays through a conventional optical system is long-linear, the long-linear image plane is divided into a plurality of small parts, a secondary image plane rearrangement group is separately designed for each part, as shown in fig. 2 to 4, the secondary image plane rearrangement groups of each part are continuously arranged, the light rays corresponding to the primary image plane are converged, and finally converged through a common lens group to form a secondary image plane. Compared with the long linear shape of the primary image surface, the rectangular secondary image surface is easier to realize photoelectric conversion.
The invention changes the detector needed by the large-field-of-view optical system from a long linear array detector to a conventional area array detector, greatly reduces the requirements on the detector, and has richer selectable detector types. While also reducing the cost of custom probes.
Due to the abundance of selectable detector types and the introduction of a two-stage image plane rearrangement optical system, the design of a conventional optical system before a primary image plane has greater freedom, and other indexes such as aberration and the like can be further optimized under the condition of not reducing a field of view. Meanwhile, the design of the optical system is more flexible, so that the whole large-field optical system can be applied to more fields.
The invention can further reduce the aberration of the system by using the optical system after the primary image surface, thereby improving the imaging quality. Particularly, because the newly added secondary image plane rearrangement group is designed for each small part of the primary image plane, the aberration of each part can be reduced as much as possible, namely, the large field of view is divided into a plurality of continuous small fields of view, and the aberration of each small field of view is optimized. And finally, balancing the integral aberration through the common lens group. Therefore, the resulting aberrations are superior to conventional large field optical systems.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.

Claims (7)

1. A few-pixel optical imaging system, comprising: the optical lens comprises a first micro lens array, a second micro lens array, a third micro lens array and an aberration calibration lens group; wherein,
the incident light passes through the primary image surface and is divided into light of a first view field, light of a second view field, light of a third view field, light of a fourth view field and light of a fifth view field;
the light rays of the first field, the light rays of the second field, the light rays of the third field, the light rays of the fourth field and the light rays of the fifth field sequentially pass through the first micro lens array, the second micro lens array, the third micro lens array and the aberration calibration lens group respectively to obtain first aberration correction light rays, second aberration correction light rays, third aberration correction light rays, fourth aberration correction light rays and fifth aberration correction light rays, and the first aberration correction light rays, the second aberration correction light rays, the third aberration correction light rays, the fourth aberration correction light rays and the fifth aberration correction light rays form a secondary rectangular image surface; wherein, the primary image surface is in a long linear array type;
the first micro lens array comprises a first micro lens (1-1), a fourth micro lens (1-2), a seventh micro lens (1-3), a tenth micro lens (1-4) and a thirteenth micro lens (1-5);
the second micro lens array comprises a second micro lens (2-1), a fifth micro lens (2-2), an eighth micro lens (2-3), an eleventh micro lens (2-4) and a fourteenth micro lens (2-5);
the third micro lens array comprises a third micro lens (3-1), a sixth micro lens (3-2), a ninth micro lens (3-3), a twelfth micro lens (3-4) and a fifteenth micro lens (3-5);
the aberration calibration lens group comprises a first lens (4), a second lens (5), a third lens (6) and a fourth lens (7);
the light of the first field of view sequentially passes through a first micro lens (1-1), a second micro lens (2-1) and a third micro lens (3-1), and then sequentially passes through a first lens (4), a second lens (5), a third lens (6) and a fourth lens (7) to obtain first aberration correction light;
the light of the second field of view sequentially passes through a fourth micro lens (1-2), a fifth micro lens (2-2) and a sixth micro lens (3-2), and then sequentially passes through a first lens (4), a second lens (5), a third lens (6) and a fourth lens (7) to obtain second aberration correction light;
the light of the third field of view sequentially passes through a seventh tiny lens (1-3), an eighth tiny lens (2-3) and a ninth tiny lens (3-3), and then sequentially passes through a first lens (4), a second lens (5), a third lens (6) and a fourth lens (7) to obtain third aberration correction light;
the light of the fourth field of view sequentially passes through tenth micro lenses (1-4), eleventh micro lenses (2-4) and twelfth micro lenses (3-4), and then sequentially passes through the first lens (4), the second lens (5), the third lens (6) and the fourth lens (7) to obtain fourth aberration correction light;
the light of the fifth field of view sequentially passes through a thirteenth micro lens (1-5), a fourteenth micro lens (2-5) and a fifteenth micro lens (3-5), and then sequentially passes through a first lens (4), a second lens (5), a third lens (6) and a fourth lens (7) to obtain a fifth aberration correction light;
the first aberration correction light ray, the second aberration correction light ray, the third aberration correction light ray, the fourth aberration correction light ray and the fifth aberration correction light ray form a secondary rectangular image surface;
the distance between the primary image surface and the left mirror surface of the first micro lens (1-1) is 10mm, the curvature radius of the left mirror surface of the first micro lens (1-1) is-27.4 mm, the curvature radius of the right mirror surface of the first micro lens (1-1) is-30.9 mm, the thickness of the first micro lens (1-1) is 10mm, the distance between the right mirror surface of the first micro lens (1-1) and the left mirror surface of the second micro lens (2-1) is 19.8mm, the clear aperture of the left mirror surface of the first micro lens (1-1) is 8.8mm, and the clear aperture of the right mirror surface of the first micro lens (1-1) is 11.6 mm;
the curvature radius of the left mirror surface of the fourth micro lens (1-2) is-27.6 mm, the curvature radius of the right mirror surface of the fourth micro lens (1-2) is-30.9 mm, the thickness of the fourth micro lens (1-2) is 10mm, the distance between the right mirror surface of the fourth micro lens (1-2) and the left mirror surface of the fifth micro lens (2-2) is 19.8mm, the clear aperture of the left mirror surface of the fourth micro lens (1-2) is 8.5mm, and the clear aperture of the right mirror surface of the fourth micro lens (1-2) is 11.1 mm;
the curvature radius of the left mirror surface of the seventh micro lens (1-3) is-27.6 mm, the curvature radius of the right mirror surface of the seventh micro lens (1-3) is-30.9 mm, the thickness of the seventh micro lens (1-3) is 10mm, the distance between the right mirror surface of the seventh micro lens (1-3) and the left mirror surface of the eighth micro lens (2-3) is 19.8mm, the clear aperture of the left mirror surface of the seventh micro lens (1-3) is 8.2mm, and the clear aperture of the right mirror surface of the seventh micro lens (1-3) is 10.7 mm;
the curvature radius of the left mirror surface of the tenth micro lens (1-4) is-27.6 mm, the curvature radius of the right mirror surface of the tenth micro lens (1-4) is-30.9 mm, the thickness of the tenth micro lens (1-4) is 10mm, the distance between the right mirror surface of the tenth micro lens (1-4) and the left mirror surface of the eleventh micro lens (2-4) is 19.8mm, the clear aperture of the left mirror surface of the tenth micro lens (1-4) is 8.5mm, and the clear aperture of the right mirror surface of the tenth micro lens (1-4) is 11.1 mm;
the curvature radius of the left mirror surface of the thirteenth micro lens (1-5) is-27.6 mm, the curvature radius of the right mirror surface of the thirteenth micro lens (1-5) is-30.9 mm, the thickness of the thirteenth micro lens (1-5) is 10mm, the distance between the right mirror surface of the thirteenth micro lens (1-5) and the left mirror surface of the fourteenth micro lens (2-5) is 19.8mm, the clear aperture of the left mirror surface of the thirteenth micro lens (1-5) is 8.8mm, and the clear aperture of the right mirror surface of the thirteenth micro lens (1-5) is 11.6 mm.
2. The few-pixel optical imaging system of claim 1, wherein: the curvature radius of the left mirror surface of the second micro lens (2-1) is-299.1 mm, the curvature radius of the right mirror surface of the second micro lens (2-1) is 153.9mm, the thickness of the second micro lens (2-1) is 10mm, the distance between the right mirror surface of the second micro lens (2-1) and the left mirror surface of the third micro lens (3-1) is 4.4mm, the clear aperture of the left mirror surface of the second micro lens (2-1) is 13.4mm, and the clear aperture of the right mirror surface of the second micro lens (2-1) is 14.1 mm;
the curvature radius of the left mirror surface of the fifth micro lens (2-2) is-299.1 mm, the curvature radius of the right mirror surface of the fifth micro lens (2-2) is 153.9mm, the thickness of the fifth micro lens (2-2) is 10mm, the distance between the right mirror surface of the fifth micro lens (2-2) and the left mirror surface of the sixth micro lens (3-2) is 4.4mm, the clear aperture of the left mirror surface of the fifth micro lens (2-2) is 12.4mm, and the clear aperture of the right mirror surface of the fifth micro lens (2-2) is 14.9 mm;
the curvature radius of the left mirror surface of the eighth micro lens (2-3) is-299.1 mm, the curvature radius of the right mirror surface of the eighth micro lens (2-3) is 153.9mm, the thickness of the eighth micro lens (2-3) is 10mm, the distance between the right mirror surface of the eighth micro lens (2-3) and the left mirror surface of the ninth micro lens (3-3) is 4.4mm, the clear aperture of the left mirror surface of the eighth micro lens (2-3) is 11.4mm, and the clear aperture of the right mirror surface of the eighth micro lens (2-3) is 11.8 mm;
the curvature radius of the left mirror surface of the eleventh micro lens (2-4) is-299.1 mm, the curvature radius of the right mirror surface of the eleventh micro lens (2-4) is 153.9mm, the thickness of the eleventh micro lens (2-4) is 10mm, the distance between the right mirror surface of the eleventh micro lens (2-4) and the left mirror surface of the twelfth micro lens (3-4) is 4.4mm, the clear aperture of the left mirror surface of the eleventh micro lens (2-4) is 12.4mm, and the clear aperture of the right mirror surface of the eleventh micro lens (2-4) is 12.9 mm;
the curvature radius of the left mirror surface of the fourteenth micro lens (2-5) is-299.1 mm, the curvature radius of the right mirror surface of the fourteenth micro lens (2-5) is 153.9mm, the thickness of the fourteenth micro lens (2-5) is 10mm, the distance between the right mirror surface of the fourteenth micro lens (2-5) and the left mirror surface of the fifteenth micro lens (3-5) is 4.4mm, the clear aperture of the left mirror surface of the fourteenth micro lens (2-5) is 12.4mm, and the clear aperture of the right mirror surface of the fourteenth micro lens (2-5) is 12.9 mm.
3. The few-pixel optical imaging system of claim 1, wherein: the curvature radius of the left mirror surface of the third micro lens (3-1) is 653.6mm, the curvature radius of the right mirror surface of the third micro lens (3-1) is-71.9 mm, the thickness of the third micro lens (3-1) is 9.99mm, the distance between the right mirror surface of the third micro lens (3-1) and the left mirror surface of the first lens (4) is 40mm, the clear aperture of the left mirror surface of the third micro lens (3-1) is 16.3mm, and the clear aperture of the right mirror surface of the third micro lens (3-1) is 17.3 mm;
the curvature radius of the left mirror surface of the sixth micro lens (3-2) is 653.6mm, the curvature radius of the right mirror surface of the sixth micro lens (3-2) is-71.9 mm, the thickness of the sixth micro lens (3-2) is 9.99mm, the distance between the right mirror surface of the sixth micro lens (3-2) and the left mirror surface of the first lens (4) is 40mm, the clear aperture of the left mirror surface of the sixth micro lens (3-2) is 14.9mm, and the clear aperture of the right mirror surface of the sixth micro lens (3-2) is 15.8 mm;
the curvature radius of the left mirror surface of the ninth micro lens (3-3) is 653.6mm, the curvature radius of the right mirror surface of the ninth micro lens (3-3) is-71.9 mm, the thickness of the ninth micro lens (3-3) is 9.99mm, the distance between the right mirror surface of the ninth micro lens (3-3) and the left mirror surface of the first lens (4) is 40mm, the clear aperture of the left mirror surface of the ninth micro lens (3-3) is 13.5mm, and the clear aperture of the right mirror surface of the ninth micro lens (3-3) is 14.3 mm;
the curvature radius of the left mirror surface of the twelfth micro lens (3-4) is 653.6mm, the curvature radius of the right mirror surface of the twelfth micro lens (3-4) is-71.9 mm, the thickness of the twelfth micro lens (3-4) is 9.99mm, the distance between the right mirror surface of the twelfth micro lens (3-4) and the left mirror surface of the first lens (4) is 40mm, the clear aperture of the left mirror surface of the twelfth micro lens (3-4) is 14.9mm, and the clear aperture of the right mirror surface of the twelfth micro lens (3-4) is 15.8 mm;
the curvature radius of the left mirror surface of the fifteenth micro lens (3-5) is 653.6mm, the curvature radius of the right mirror surface of the fifteenth micro lens (3-5) is-71.9 mm, the thickness of the fifteenth micro lens (3-5) is 9.99mm, the distance between the right mirror surface of the fifteenth micro lens (3-5) and the left mirror surface of the first lens (4) is 40mm, the clear aperture of the left mirror surface of the fifteenth micro lens (3-5) is 16.3mm, and the clear aperture of the right mirror surface of the fifteenth micro lens (3-5) is 17.3 mm.
4. The few-pixel optical imaging system of claim 1, wherein: the curvature radius of the left mirror surface of the first lens (4) is 70.3mm, the curvature radius of the right mirror surface of the first lens (4) is 146.8mm, the thickness of the first lens (4) is 9.99mm, the distance between the right mirror surface of the first lens (4) and the left mirror surface of the second lens (5) is 15.2mm, the clear aperture of the left mirror surface of the first lens (4) is 40mm, and the clear aperture of the right mirror surface of the first lens (4) is 40 mm.
5. The few-pixel optical imaging system of claim 1, wherein: the curvature radius of the left mirror surface of the second lens (5) is-106.6 mm, the curvature radius of the right mirror surface of the second lens (5) is-112 mm, the thickness of the second lens (5) is 8.2mm, the distance between the right mirror surface of the second lens (5) and the left mirror surface of the third lens (6) is 0.7mm, the clear aperture of the left mirror surface of the second lens (5) is 40mm, and the clear aperture of the right mirror surface of the second lens (5) is 40 mm.
6. The few-pixel optical imaging system of claim 1, wherein: the curvature radius of the left mirror surface of the third lens (6) is-93.7 mm, the curvature radius of the right mirror surface of the third lens (6) is-132.1 mm, the thickness of the third lens (6) is 7.2mm, the distance between the right mirror surface of the third lens (6) and the left mirror surface of the fourth lens (7) is 29mm, the clear aperture of the left mirror surface of the third lens (6) is 35mm, and the clear aperture of the right mirror surface of the third lens (6) is 35 mm.
7. The few-pixel optical imaging system of claim 1, wherein: the curvature radius of the left mirror surface of the fourth lens (7) is 25.1mm, the curvature radius of the right mirror surface of the fourth lens (7) is 23.1mm, the thickness of the fourth lens (7) is 10.2mm, the distance between the right mirror surface of the fourth lens (7) and the secondary rectangular image surface is 4.2mm, the clear aperture of the left mirror surface of the fourth lens (7) is 20mm, and the clear aperture of the right mirror surface of the fourth lens (7) is 20 mm.
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CN110308553A (en) * 2019-07-29 2019-10-08 天津大学 The middle infrared imaging optical system of visual field switching is carried out based on microlens array

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JP2008139199A (en) * 2006-12-04 2008-06-19 Japan Aerospace Exploration Agency Optical device and optical design method
CN101750754A (en) * 2008-12-17 2010-06-23 中国科学院西安光学精密机械研究所 Visual field division type optical synthetic aperture imaging system
CN208580258U (en) * 2018-06-04 2019-03-05 中国科学院西安光学精密机械研究所 Coaxial bias field type long wave infrared system based on spherical reflector
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