CN115712199A - Low-light-level optical system with strong light interference resistance and ultra-long eye spot distance and application thereof - Google Patents
Low-light-level optical system with strong light interference resistance and ultra-long eye spot distance and application thereof Download PDFInfo
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- CN115712199A CN115712199A CN202211430433.1A CN202211430433A CN115712199A CN 115712199 A CN115712199 A CN 115712199A CN 202211430433 A CN202211430433 A CN 202211430433A CN 115712199 A CN115712199 A CN 115712199A
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Abstract
The invention relates to a low-light-level optical system with strong light interference resistance and ultra-long eye-point distance and application thereof. The optical system comprises a first objective lens (1), a first objective cemented lens (2), a second objective cemented lens (3), a sixth objective lens (4), a CMOS detector, an OLED micro-display (5), a first eyepiece cemented lens (6), a third eyepiece cemented lens (7), a fourth eyepiece cemented lens (8) and a fifth eyepiece lens (9) which are coaxially arranged in sequence. The detection result shows that the low-light-level optical system can resist strong light with an included angle within 15 degrees, has an ultra-long eyepoint distance of more than or equal to 73mm, has the amplification factor of 3 times and the working waveband of 0.4-1 mu m, and is particularly suitable for low-light-level sights.
Description
Technical Field
The invention relates to the technical field of optical imaging equipment, in particular to a low-light-level optical system with strong light interference resistance and ultra-long eye-point distance and application thereof.
Background
The continuous development of society makes the demand of low-light-level night vision product in civilian and military fields continuously increase, along with the continuous expansion of application scope the defect that low-light-level night vision product is easily disturbed by high light when using night or daytime also exposes along with the low-light-level night vision product. For the existing low-light optical system, when the front of the objective optical system is irradiated by strong light (the light source and the axis of the optical system form an included angle within 15 degrees), the imaging effect is seriously interfered, and the imaging effect is specifically expressed in that glare, halo and the like are presented on a display picture, the observation and aiming effect is directly influenced, and even the locked target cannot be observed.
In addition, the eye point distances of the existing fixed-focus eyepiece optical systems are less than 60mm under the condition that the number of required lenses is small (the number of the lenses is not more than 5). Similar focusing eyepieces are disclosed in published Chinese patents CN108897131A, CN216696847U, CN103605205A, CN108398778A, CN114545617A, CN216013818U, CN211348852U and CN207529023U. The number of lenses of the fixed-focus eyepiece optical system with the eye point distance larger than 60mm is often large (the number of lenses is about 8), and the total length of the optical system of the eyepiece is long, and the similar fixed-focus eyepiece is referred to the published Chinese patent CN114019672A. Even though the eyepiece with the eye point distance of 70mm is usually realized by using a zoom optical system, the total length of the optical system of the eyepiece is also longer, and the similar zoom eyepiece is disclosed in the published Chinese patent CN207882560U.
In view of the above situation, the invention provides a fixed-focus eyepiece optical system with a novel structure, which not only has better strong light interference resistance, but also has a shorter total length, a smaller number of lenses (only 5 lenses are used), and has a very outstanding comprehensive performance with an eye-point distance larger than 73 mm.
Disclosure of Invention
The invention aims to provide a micro-optic system with strong light interference resistance and ultra-long eye-point distance, which comprises an objective optical system, a detector and an eyepiece optical system which are coaxially arranged in sequence. The objective optical system comprises a first objective lens (1), a first objective cemented lens (2), a second objective cemented lens (3) and a sixth objective lens (4) which are coaxially arranged in sequence, and the eyepiece optical system comprises a display, a first eyepiece cemented lens (6), a third eyepiece cemented lens (7), a fourth eyepiece cemented lens (8) and a fifth eyepiece cemented lens (9) which are coaxially arranged in sequence; the detector is located between the sixth lens (4) of the objective lens and the display.
Further, first lens of objective (1) is biconvex positive lens, first cemented lens of objective (2) is formed by the veneer of biconvex type objective second lens a and biconcave type objective third lens b, objective second cemented lens (3) is formed by the veneer of biconcave type objective fourth lens c and biconvex type objective fifth lens d, objective sixth lens (4) is unsmooth positive lens and its convex surface is close to the image side.
Furthermore, the first cemented lens (6) of eyepiece is formed by the first lens e of eyepiece of biconcave type and the second lens f veneer of eyepiece of biconvex type, eyepiece third lens (7) are unsmooth positive lens and its concave surface is close to the image side, eyepiece fourth lens (8) are biconvex positive lens, eyepiece fifth lens (9) are biconvex positive lens.
Further, the curvature radius of the object side of the first lens (1) of the objective lens is 81.41mm, and the curvature radius of the image side of the first lens is-1219 mm; the curvature radius of the second lens a of the objective lens is 25.53mm at the object side, and the curvature radius of the second lens a of the objective lens is-188.8 mm at the image side; the curvature radius of the object side of the third lens b is-188.8 mm, and the curvature radius of the image side of the third lens b is 44.87mm; the curvature radius of the fourth lens c of the objective lens is-62.23 mm at the object side, and the curvature radius of the fourth lens c of the objective lens is 27.61mm at the image side; the curvature radius of the fifth lens d of the objective lens is 27.61mm on the object side, and the curvature radius of the image side is-65.16 mm; the curvature radius of the object side of the sixth lens (4) of the objective lens is-16.872 mm, and the curvature radius of the image side of the sixth lens is-48.31 mm; the curvature radius of the object side of the first lens e of the eyepiece is 81.41mm, and the curvature radius of the image side of the first lens e of the eyepiece is-20 mm; the curvature radius of the second eyepiece lens f on the object side is-26.92 mm, and the curvature radius of the image side is 81.41mm; the curvature radius of the object side of the eyepiece third lens (7) is-21.53 mm, and the curvature radius of the image side is-63.83 mm; the curvature radius of the object side of the fourth lens (8) of the eyepiece is-48.31 mm, and the curvature radius of the image side of the fourth lens is 118.03mm; the curvature radius of the object side of the eyepiece fifth lens (9) is-194.54 mm, and the curvature radius of the image side of the eyepiece fifth lens is 65.16mm.
Further, the refractive index of the first lens (1) of the objective lens is 1.57, and the Abbe number is 42.8; the refractive index of the second lens a of the objective lens is 1.57, and the Abbe number is 57.5; the refractive index of the third lens b of the objective lens is 1.95, and the Abbe number is 17.9; the refractive index of the fourth lens c of the objective lens is 1.49, and the Abbe number is 70.4; the refractive index of a fifth lens d of the objective lens is 1.95, and the Abbe number is 32.3; the refractive index of the sixth lens (4) of the objective lens is 1.49, and the Abbe number is 70.4; the refractive index of the eyepiece first lens e is 1.95, and the Abbe number is 17.9; the refractive index of the second eyepiece lens f is 1.64, and the Abbe number is 60.2; the refractive index of the eyepiece third lens (7) is 1.49, and the Abbe number is 70.4; the refractive index of the fourth lens (8) of the eyepiece is 1.49, and the Abbe number is 70.4; the refractive index of the eyepiece fifth lens (9) is 1.64, and the Abbe number is 60.2.
Further, the center thickness of the first lens (1) of objective is 7.15mm, the center thickness of the second lens a of objective is 9.17mm, the center thickness of the third lens b of objective is 1.8mm, the center thickness of the fourth lens c of objective is 1.5mm, the center thickness of the fifth lens d of objective is 4.17mm, the center thickness of the sixth lens (4) of objective is 1.5mm, the center thickness of the first lens e of eyepiece is 1.5mm, the center thickness of the second lens f of eyepiece is 6.93mm, the center thickness of the third lens (7) of eyepiece is 7.81mm, the center thickness of the fourth lens (8) of eyepiece is 8.36mm, the center thickness of the fifth lens (9) of eyepiece is 6.36mm.
Furthermore, the interval between the first objective lens (1) and the first objective lens (2) is 35.5mm, the interval between the first objective lens (2) and the second objective lens (3) is 23.25mm, the interval between the second objective lens (3) and the sixth objective lens (4) is 7.45mm, the interval between the sixth objective lens (4) and the CMOS detector is 8.91mm, the interval between the OLED micro display (5) and the first eyepiece lens (6) is 8.34mm, the interval between the first eyepiece lens (6) and the third eyepiece lens (7) is 0.1mm, the interval between the third eyepiece lens (7) and the fourth eyepiece lens (8) is 0.49mm, and the interval between the fourth eyepiece lens (8) and the fifth eyepiece lens (9) is 0.1mm. The distance from the leftmost end of the first cemented lens (2) of the objective lens to the rightmost end of the sixth lens (4) of the objective lens is 91.49mm, and the distance from the leftmost end of the first cemented lens (6) of the eyepiece lens to the rightmost end of the fifth lens (9) is 34.62mm.
Further, the detector is embodied as a CMOS detector, and the display is embodied as an OLED micro display (5). The CMOS detector is used for converting optical signals into electric signals, and the OLED microdisplay is used for displaying low-light images.
Furthermore, the parts except the spherical surface of the first objective lens (1), the first objective lens cemented lens (2), the second objective lens cemented lens (3), the sixth objective lens (4) and the first eyepiece cemented lens (6) are coated with matting paint.
Furthermore, the working waveband of the low-light-level optical system is 0.4-1.0 mu m, the eyepoint distance is more than or equal to 73mm, the low-light-level optical system can resist high light with an included angle within 15 degrees, and the magnification is 3 times.
The second objective of the present invention is to provide the application of the above-mentioned low-light-level optical system for resisting strong light interference and ultra-long eye distance in gun aiming.
Compared with the prior similar products, the invention has the beneficial effects that:
(1) The eyepoint distance d is more than or equal to 73mm, the ultra-long eyepoint distance enables the user to have wider use space, the full-eyepiece full-field of view can be obtained even if the user wears a gas mask or goggles and other equipment, and the ultra-long eyepoint distance can prevent the eyepiece from injuring the eyes of the user due to recoil when the user shoots with naked eyes;
(2) The optical system can resist strong light with an included angle within 15 degrees, and when the strong light with the included angle within 15 degrees is irradiated, the optical system can still clearly image without phenomena of glare, halo and the like;
(3) The overall device is simpler in construction and better optical performance is achieved with fewer lenses and a shorter overall system length.
Drawings
FIG. 1 is a schematic view of the structure of an anti-glare and ultra-long eyepoint distance micro-optic system according to the present invention.
Fig. 2 is a schematic view of the anti-strong light interference angle.
Fig. 3 is a graph of field curvature and distortion characteristics of the objective lens of fig. 1.
Fig. 4 is a graph of axial aberration of the objective lens of fig. 1.
Fig. 5 is the objective MTF of fig. 1.
Fig. 6 is a diagram of aberration spots of the objective lens of fig. 1.
Fig. 7 is a graph of the curvature of field and distortion characteristics of the eyepiece of fig. 1.
Fig. 8 is a graph of axial aberration of the eyepiece of fig. 1.
Fig. 9 is the eyepiece MTF in fig. 1.
Fig. 10 is a diagram of ocular aberration plots in fig. 1.
In the figure: the micro-display device comprises a 1-objective lens first lens, a 2-objective lens first cemented lens, a 3-objective lens second cemented lens, a 4-objective lens sixth lens, a 5-OLED micro-display, a 6-eyepiece lens first cemented lens, a 7-eyepiece lens third lens, an 8-eyepiece lens fourth lens and a 9-eyepiece lens fifth lens.
Detailed Description
In order to make those skilled in the art fully understand the technical solutions and advantages of the present invention, the following description is further provided with reference to the specific embodiments and the accompanying drawings.
As shown in figure 1, the low-light optical system for the gun aiming, which is resistant to strong light interference and has the ultra-long eye-point distance, is provided with a first objective lens (1), a first objective cemented lens (2), a second objective cemented lens (3), a sixth objective lens (4), a CMOS detector, an OLED micro-display (5), a first eyepiece cemented lens (6), a third eyepiece lens (7), a fourth eyepiece lens (8) and a fifth eyepiece lens (9) in sequence from an object side to an image side (corresponding to the left to the right in figure 1). The first lens (1) of the objective lens, the first cemented lens (2) of the objective lens, the second cemented lens (3) of the objective lens and the sixth lens (4) of the objective lens form an objective optical system, and the OLED micro display (5), the first cemented lens (6) of the eyepiece lens, the third lens (7) of the eyepiece lens, the fourth lens (8) of the eyepiece lens and the fifth lens (9) of the eyepiece lens form the eyepiece optical system.
The specific types of the respective lenses are as follows: the first objective lens (1) is a biconvex positive lens, the first objective cemented lens (2) is formed by gluing a biconvex objective lens second lens a and a biconcave objective lens third lens b, the second objective cemented lens (3) is formed by gluing a biconcave objective lens fourth lens c and a biconvex objective lens fifth lens d, the sixth objective lens (4) is a concave-convex positive lens, the convex surface of the concave-convex positive lens is close to the image side, the first eyepiece cemented lens (6) is formed by gluing a biconcave eyepiece first lens e and a biconvex eyepiece second lens f, the third eyepiece lens (7) is a concave-convex positive lens, the concave surface of the concave-convex eyepiece lens is close to the image side, the fourth eyepiece lens (8) is a biconvex positive lens, and the fifth eyepiece lens (9) is a biconvex positive lens. The parts except the spherical surface of the first objective lens (1), the first objective lens cemented lens (2), the second objective lens cemented lens (3), the sixth objective lens (4) and the first eyepiece cemented lens (6) are coated with a layer of matting paint, and the thickness of the paint layer is 0.01-0.03 mm.
The radii of curvature of the individual lenses are as follows: the curvature radius of the object side of the first lens (1) of the objective lens is 81.41mm, and the curvature radius of the image side of the first lens is-1219 mm; the curvature radius of the second lens a of the objective lens on the object side is 25.53mm, and the curvature radius of the second lens a on the image side is-188.8 mm; the curvature radius of the object side of the third lens b of the objective lens is-188.8 mm, and the curvature radius of the image side of the third lens b of the objective lens is 44.87mm; the curvature radius of the fourth lens c of the objective lens is-62.23 mm at the object side, and the curvature radius of the fourth lens c of the objective lens is 27.61mm at the image side; the curvature radius of the fifth lens d of the objective lens is 27.61mm on the object side, and the curvature radius of the image side is-65.16 mm; the curvature radius of the object side of the sixth lens (4) of the objective lens is-16.872 mm, and the curvature radius of the image side of the sixth lens is-48.31 mm; the curvature radius of the object side of the first lens e of the eyepiece is 81.41mm, and the curvature radius of the image side of the first lens e of the eyepiece is-20 mm; the curvature radius of the f object side of the second eyepiece lens is-26.92 mm, and the curvature radius of the image side of the second eyepiece lens is 81.41mm; the curvature radius of the object side of the eyepiece third lens (7) is-21.53 mm, and the curvature radius of the image side is-63.83 mm; the curvature radius of the fourth lens (8) of the eyepiece on the object side is-48.31 mm, and the curvature radius of the image side is 118.03mm; the curvature radius of the object side of the ocular fifth lens (9) is-194.54 mm, and the curvature radius of the image side of the ocular fifth lens is 65.16mm.
The refractive index of each lens is as follows: the refractive index of the first lens (1) of the objective lens is 1.57, and the Abbe number is 42.8; the refractive index of the second lens a of the objective lens is 1.57, and the Abbe number is 57.5; the refractive index of the third lens b of the objective lens is 1.95, and the Abbe number is 17.9; the refractive index of the fourth lens c of the objective lens is 1.49, and the Abbe number is 70.4; the refractive index of the fifth lens d of the objective lens is 1.95, and the Abbe number is 32.3; the refractive index of the sixth lens (4) of the objective lens is 1.49, and the Abbe number is 70.4; the refractive index of the eyepiece first lens e is 1.95, and the Abbe number is 17.9; the refractive index of the second eyepiece lens f is 1.64, and the Abbe number is 60.2; the refractive index of the ocular third lens (7) is 1.49, and the Abbe number is 70.4; the refractive index of the fourth lens (8) of the eyepiece is 1.49, and the Abbe number is 70.4; the refractive index of the eyepiece fifth lens (9) is 1.64, and the Abbe number is 60.2.
The center thickness of each lens is as follows: the center thickness of the first lens (1) of the objective lens is 7.15mm, the center thickness of the second lens a of the objective lens is 9.17mm, the center thickness of the third lens b of the objective lens is 1.8mm, the center thickness of the fourth lens c of the objective lens is 1.5mm, the center thickness of the fifth lens d of the objective lens is 4.17mm, and the center thickness of the sixth lens (4) of the objective lens is 1.5mm; the center thickness of the first eyepiece lens e is 1.5mm, the center thickness of the second eyepiece lens f is 6.93mm, the center thickness of the third eyepiece lens (7) is 7.81mm, the center thickness of the fourth eyepiece lens (8) is 8.36mm, and the center thickness of the fifth eyepiece lens (9) is 6.36mm.
The spacing of the individual lenses from each other is as follows: the distance between the first objective lens (1) and the first objective lens (2) is 35.5mm, the distance between the first objective lens (2) and the second objective lens (3) is 23.25mm, the distance between the second objective lens (3) and the sixth objective lens (4) is 7.45mm, the distance between the sixth objective lens (4) and the CMOS detector is 8.91mm, the distance between the OLED microdisplay (5) and the first eyepiece lens (6) is 8.34mm, the distance between the first eyepiece lens (6) and the third eyepiece lens (7) is 0.1mm, the distance between the third eyepiece lens (7) and the fourth eyepiece lens (8) is 0.49mm, and the distance between the fourth eyepiece lens (8) and the fifth eyepiece lens (9) is 0.1mm. In addition, the distance from the leftmost end of the objective lens first cemented lens (2) to the rightmost end of the objective lens sixth lens (4) is 91.49mm, and the distance from the leftmost end of the eyepiece lens first cemented lens (6) to the rightmost end of the fifth lens (9) is 34.62mm.
The specific parameters (mm) of the individual lenses in the optical system are shown in the following table:
TABLE 1 lens parameter Table
The test result shows that the working waveband of the optical system is 0.4-0.9 μm, the magnification is 3 times, the eye point distance d is more than or equal to 73mm (namely the distance from the convex surface of the fifth lens (9) of the eyepiece in the figure 1 to the eyes), and the optical system can resist strong light with an included angle within 15 degrees (as shown in the figure 2). The results of the correlation tests are shown in fig. 2-10, respectively.
As shown in FIG. 3, the spherical aberration of the objective lens is 0.04 in the whole aperture range, and the axial chromatic aberration is in a better balance state. As shown in fig. 4, the field curvature of the objective lens is less than 0.1, near the minimum limit, the distortion is less than 2% at 100% of the field, the aberration correction is very good, and the objective lens meets the requirement. As shown in fig. 5, the optical transfer function (MTF) of the objective lens is related to the aberration and diffraction capability of the system, and the highest spatial frequency that can be resolved by the detector is the nyquist frequency, which is the reciprocal of 2 times the pixel size of the detector; the MTF of the axial light at the Nyquist frequency 401p/mm is larger than 0.45, the MTF of the edge light at the Nyquist frequency 401p/mm is larger than 0.2, the imaging requirement is met, the center imaging quality is good, the edge imaging is clear, and the tolerance margin of subsequent processing and adjustment is provided. As shown in fig. 6, it can be seen from the objective lens point diagram that the root-mean-square radius of the diffuse spot of each field of the system is close to 13 micrometers, which is equivalent to the size of a single pixel (13 micrometers), which indicates that the energy concentration ratio is good, and the design requirement of the optical system is satisfied. As shown in the field curvature and distortion diagram of the eyepiece shown in fig. 7, the field curvature is less than 1.0, the distortion is less than 5% at a 100% field of view, and considering that the caliber of the eyepiece is large and the aberration correction difficulty is high, the aberration correction of the eyepiece is very good in combination, and after the aberration compensation is performed by combining the objective, the imaging quality is very good and meets the requirements. As shown in fig. 8, the axial chromatic aberration of the eyepiece is already 0.03 within 0.7 aperture, approaching the minimum limit, which indicates that the aberration correction is very good and satisfactory. As shown in FIG. 9, the MTF of the light ray on the MTF curve axis of the eyepiece at the Nyquist frequency 401p/mm is greater than 0.4, the MTF of the marginal light ray at the Nyquist frequency 401p/mm is greater than 0.1, the imaging quality is very good after aberration compensation is carried out by combining the objective lens, the imaging requirement is met, and the tolerance margin of subsequent processing and adjustment is provided. As shown in FIG. 10, it can be seen from the point diagram of the ocular that the diffuse spot root-mean-square radius of each field of view of the system is smaller, the energy concentration is better, and the design requirements of the optical system are met.
Claims (10)
1. The utility model provides a little optical system of strong light interference of anti and overlength eye distance which characterized in that: the micro-optic system comprises an objective optical system, a detector and an eyepiece optical system which are coaxially arranged in sequence; the objective optical system comprises a first objective lens (1), a first objective cemented lens (2), a second objective cemented lens (3) and a sixth objective lens (4) which are coaxially arranged in sequence; the eyepiece optical system comprises a display, an eyepiece first cemented lens (6), an eyepiece third lens (7), an eyepiece fourth lens (8) and an eyepiece fifth lens (9) which are coaxially arranged in sequence; the detector is located between the sixth lens (4) of the objective lens and the display.
2. The micro-optic system as claimed in claim 1, wherein: the first objective lens (1) is a biconvex positive lens, the first objective lens (2) is formed by gluing a biconvex objective lens second lens a and a biconcave objective lens third lens b, the second objective lens (3) is formed by gluing a biconcave objective lens fourth lens c and a biconvex objective lens fifth lens d, and the sixth objective lens (4) is a concavo-convex positive lens, and the convex surface of the sixth objective lens is close to the image side; the first cemented lens (6) of eyepiece is formed by the first lens e of eyepiece of biconcave type and the veneer of biconvex type eyepiece second lens f, eyepiece third lens (7) are concave-convex positive lens and its concave surface are close to the image side, eyepiece fourth lens (8) are biconvex positive lens, eyepiece fifth lens (9) are biconvex positive lens.
3. The micro-optic system as claimed in claim 2, wherein: the curvature radius of the object side of the first lens (1) of the objective lens is 81.41mm, and the curvature radius of the image side of the first lens is-1219 mm; the curvature radius of the second lens a of the objective lens is 25.53mm at the object side, and the curvature radius of the second lens a of the objective lens is-188.8 mm at the image side; the curvature radius of the object side of the third lens b is-188.8 mm, and the curvature radius of the image side of the third lens b is 44.87mm; the curvature radius of the fourth lens c of the objective lens is-62.23 mm at the object side, and the curvature radius of the fourth lens c of the objective lens is 27.61mm at the image side; the curvature radius of the fifth lens d of the objective lens is 27.61mm on the object side, and the curvature radius of the image side is-65.16 mm; the curvature radius of the object side of the sixth lens (4) of the objective lens is-16.872 mm, and the curvature radius of the image side of the sixth lens is-48.31 mm; the curvature radius of the object side of the first eyepiece lens e is 81.41mm, and the curvature radius of the image side is-20 mm; the curvature radius of the second eyepiece lens f on the object side is-26.92 mm, and the curvature radius of the image side is 81.41mm; the curvature radius of the object side of the eyepiece third lens (7) is-21.53 mm, and the curvature radius of the image side is-63.83 mm; the curvature radius of the object side of the fourth lens (8) of the eyepiece is-48.31 mm, and the curvature radius of the image side of the fourth lens is 118.03mm; the curvature radius of the object side of the eyepiece fifth lens (9) is-194.54 mm, and the curvature radius of the image side of the eyepiece fifth lens is 65.16mm.
4. The micro-optic system as claimed in claim 2, wherein: the refractive index of the first lens (1) of the objective lens is 1.57, and the Abbe number is 42.8; the refractive index of the second lens a of the objective lens is 1.57, and the Abbe number is 57.5; the refractive index of the third lens b of the objective lens is 1.95, and the Abbe number is 17.9; the refractive index of the fourth lens c of the objective lens is 1.49, and the Abbe number is 70.4; the refractive index of the fifth lens d of the objective lens is 1.95, and the Abbe number is 32.3; the refractive index of the sixth lens (4) of the objective lens is 1.49, and the Abbe number is 70.4; the refractive index of the eyepiece first lens e is 1.95, and the Abbe number is 17.9; the refractive index of the second eyepiece lens f is 1.64, and the Abbe number is 60.2; the refractive index of the eyepiece third lens (7) is 1.49, and the Abbe number is 70.4; the refractive index of the fourth lens (8) of the eyepiece is 1.49, and the Abbe number is 70.4; the refractive index of the eyepiece fifth lens (9) is 1.64, and the Abbe number is 60.2.
5. The micro-optic system as claimed in claim 2, wherein: the center thickness of the first lens (1) of the objective is 7.15mm, the center thickness of the second lens a of the objective is 9.17mm, the center thickness of the third lens b of the objective is 1.8mm, the center thickness of the fourth lens c of the objective is 1.5mm, the center thickness of the fifth lens d of the objective is 4.17mm, the center thickness of the sixth lens (4) of the objective is 1.5mm, the center thickness of the first lens e of the eyepiece is 1.5mm, the center thickness of the second lens f of the eyepiece is 6.93mm, the center thickness of the third lens (7) of the eyepiece is 7.81mm, the center thickness of the fourth lens (8) of the eyepiece is 8.36mm, the center thickness of the fifth lens (9) of the eyepiece is 6.36mm.
6. The micro-optic system as claimed in claim 2, wherein: the interval of the first lens (1) of the objective lens and the first cemented lens (2) of the objective lens is 35.5mm, the interval of the first cemented lens (2) of the objective lens and the second cemented lens (3) of the objective lens is 23.25mm, the interval of the second cemented lens (3) of the objective lens and the sixth lens (4) of the objective lens is 7.45mm, the interval of the sixth lens (4) of the objective lens and the CMOS detector is 8.91mm, the interval of the OLED micro-display (5) and the first cemented lens (6) of the eyepiece lens is 8.34mm, the interval of the first cemented lens (6) of the eyepiece lens and the third lens (7) of the eyepiece lens is 0.1mm, the interval of the third lens (7) of the eyepiece lens and the fourth lens (8) of the eyepiece lens is 0.49mm, and the interval of the fourth lens (8) of the eyepiece lens and the fifth lens (9) of the eyepiece lens is 0.1mm. The distance from the leftmost end of the objective lens first cemented lens (2) to the rightmost end of the objective lens sixth lens (4) is 91.49mm, and the distance from the leftmost end of the eyepiece lens first cemented lens (6) to the rightmost end of the fifth lens (9) is 34.62mm.
7. The micro-optic system as claimed in claim 1, wherein: the detector is in particular a CMOS detector and the display is in particular an OLED microdisplay (5).
8. The micro-optic system as claimed in claim 1, wherein: the parts except the spherical surface of the first objective lens (1), the first objective cemented lens (2), the second objective cemented lens (3), the sixth objective lens (4) and the first eyepiece cemented lens (6) are coated with matting paint.
9. The micro-optic system as claimed in claim 1, wherein: the working waveband of the low-light optical system is 0.4-1.0 mu m, the eyepoint distance is more than or equal to 73mm, the high-light optical system can resist the high light with an included angle within 15 degrees, and the magnification is 3 times.
10. Use of a low-light optical system as claimed in any one of claims 1 to 9 for strong light interference and extra-long eye-point distance aiming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211430433.1A CN115712199A (en) | 2022-11-15 | 2022-11-15 | Low-light-level optical system with strong light interference resistance and ultra-long eye spot distance and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211430433.1A CN115712199A (en) | 2022-11-15 | 2022-11-15 | Low-light-level optical system with strong light interference resistance and ultra-long eye spot distance and application thereof |
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| CN115712199A true CN115712199A (en) | 2023-02-24 |
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| CN202211430433.1A Pending CN115712199A (en) | 2022-11-15 | 2022-11-15 | Low-light-level optical system with strong light interference resistance and ultra-long eye spot distance and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116560065A (en) * | 2023-07-10 | 2023-08-08 | 云南汉瑞光学仪器有限公司 | Large-view-field telescope optical system |
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- 2022-11-15 CN CN202211430433.1A patent/CN115712199A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116560065A (en) * | 2023-07-10 | 2023-08-08 | 云南汉瑞光学仪器有限公司 | Large-view-field telescope optical system |
| CN116560065B (en) * | 2023-07-10 | 2023-09-08 | 云南汉瑞光学仪器有限公司 | Large-view-field telescope optical system |
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