CN116381914A - Large-field double telecentric lens - Google Patents
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- CN116381914A CN116381914A CN202310433221.7A CN202310433221A CN116381914A CN 116381914 A CN116381914 A CN 116381914A CN 202310433221 A CN202310433221 A CN 202310433221A CN 116381914 A CN116381914 A CN 116381914A
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Abstract
The invention discloses a large-view double telecentric lens, which belongs to the technical field of optical design, wherein an optical amplifying group consists of nine lenses, a first lens is a convex-concave lens, a second lens is a convex-concave lens, a third lens is a biconvex lens, a fourth lens is a biconcave lens, a fifth lens is a convex-concave lens, a sixth lens is a biconvex lens, a seventh lens is a concave-flat lens, an eighth lens is a convex-concave lens, and a ninth lens is a concave-convex lens; the imaging group consists of five lenses, wherein the tenth lens is a biconvex lens, the eleventh lens is a biconcave lens, the twelfth lens is a concave-convex lens, the thirteenth lens is a biconcave lens, the fourteenth lens is a biconvex lens, and the fifteenth lens is a biconvex lens; the thirteenth lens and the fourteenth lens are cemented with each other. On the premise of meeting the detection precision, the invention enables the visual field range of the lens to be larger than the size of the measured object, can observe all the sizes of the measured object at one time, and is convenient for measurement.
Description
Technical Field
The invention belongs to the technical field of optical design, and particularly relates to a large-field double-telecentric lens.
Background
In recent years, with the rapid development of optical technology, industrial lenses are increasingly widely applied to machine vision and scientific research, and currently, double telecentric lenses are mainly applied to mechanical part measurement, plastic part measurement, glass product and medicine part measurement, electronic element measurement and the like, and have wide application range and large application amount. In precision measurement, when the size of a measured object is larger, the small-view double-telecentric lens is generally selected to be used for image stitching through multiple shooting, so that the production efficiency is low, and the measurement accuracy is insufficient.
Therefore, as the measured size of the measured object is larger, the common small-field double-telecentric lens is difficult to meet the requirement, and the requirement for the large-field double-telecentric lens is increasing. On the premise of meeting the precision requirement of the measured object, the visual field range of the lens is larger than the size of the measured object as much as possible, so that all the sizes of the measured object can be observed at one time, and the measurement is convenient. According to the double telecentric lens technology in the current market, the visual field is generally smaller, the contrast and resolution are relatively lower, and the requirement of customers on large-visual-field precise measurement is difficult to meet.
Disclosure of Invention
The invention provides a large-view double telecentric lens for solving the technical problems in the prior art, and the view range of the lens is larger than the size of the measured object as much as possible on the premise of meeting the precision requirement of the measured object, so that the whole size of the measured object can be observed at one time, and the measurement is convenient.
The invention aims to provide a large-view double telecentric lens which sequentially comprises an optical amplifying group, an aperture diaphragm and an imaging group along an optical path;
the optical amplifying group consists of nine lenses, and the optical amplifying group sequentially comprises: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens; the first lens is a convex-concave lens, the second lens is a convex-concave lens, the third lens is a biconvex lens, the fourth lens is a biconcave lens, the fifth lens is a convex-concave lens, the sixth lens is a biconvex lens, the seventh lens is a concave-flat lens, the eighth lens is a convex-concave lens, and the ninth lens is a concave-convex lens;
the aperture diaphragm is positioned between the optical amplifying group and the imaging group;
the imaging group consists of five lenses, and the imaging group comprises the following components along the light path: tenth, eleventh, twelfth, thirteenth, fourteenth and fifteenth lenses; the tenth lens is a biconvex lens, the eleventh lens is a biconcave lens, the twelfth lens is a concave-convex lens, the thirteenth lens is a biconcave lens, the fourteenth lens is a biconvex lens, and the fifteenth lens is a biconvex lens; the thirteenth lens and the fourteenth lens are cemented with each other.
Preferably, the curvature radius of the light incident surface of the first lens is 174.321 +/-5%, and the curvature radius of the light emergent surface is 771.423 +/-5%;
the curvature radius of the light incident surface of the second lens is 113.643 +/-5%, and the curvature radius of the light emergent surface is 178.124 +/-5%;
the curvature radius of the light incident surface of the third lens is 86.430 +/-5%, and the curvature radius of the light emergent surface is-489.657 +/-5%;
the curvature radius of the light incident surface of the fourth lens is-113.886 +/-5%, and the curvature radius of the light emergent surface is 43.026 +/-5%;
the curvature radius of the light incident surface of the fifth lens is 46.233 +/-5%, and the curvature radius of the light emergent surface is 57.143 +/-5%;
the curvature radius of the light incident surface of the sixth lens is 74.256 +/-5%, and the curvature radius of the light emergent surface is-42.064 +/-5%;
the curvature radius of the light incident surface of the seventh lens is-66.438 +/-5%, and the curvature radius of the light emergent surface is infinity;
the curvature radius of the light incident surface of the eighth lens is 35.852 +/-5%, and the curvature radius of the light emergent surface is 26.333 +/-5%;
the curvature radius of the light incident surface of the ninth lens is-75.566 +/-5%, and the curvature radius of the light emergent surface is-27.765 +/-5%;
the radius of curvature of the light incident surface of the tenth lens is 13.787 +/-5%, and the radius of curvature of the light emergent surface is-324.567 +/-5%;
the curvature radius of the light incident surface of the eleventh lens is-23.765 +/-5%, and the curvature radius of the light emergent surface is 15.875 +/-5%;
the radius of curvature of the light incident surface of the twelfth lens is-186.446 +/-5%, and the radius of curvature of the light emergent surface is-16.757 +/-5%;
the curvature radius of the light incident surface of the thirteenth lens is-6.246 +/-5%, and the curvature radius of the light emergent surface is 46.967 +/-5%;
the radius of curvature of the light incident surface of the fourteenth lens is 46.965 +/-5%, and the radius of curvature of the light emergent surface is-16.665 +/-5%;
the radius of curvature of the light incident surface of the fifteenth lens is 66.356 +/-5%, and the radius of curvature of the light emergent surface is-26.286 +/-5%;
the units are all millimeters.
Preferably, the first lens has a center thickness of 10.164 + -5%; the center thickness of the second lens is 10.018 +/-5%; the center thickness of the third lens is 13.872 +/-5%; the center thickness of the fourth lens is 9.057 +/-5%; the center thickness of the fifth lens is 10.027 +/-5%; the center thickness of the sixth lens is 11.176+ -5%; the center thickness of the seventh lens is 2.981 +/-5%; the center thickness of the eighth lens is 3.977 +/-5%; the center thickness of the ninth lens is 5.983 +/-5%; the center thickness of the tenth lens is 5.026 +/-5%; the center thickness of the eleventh lens is 5.297 +/-5%; the center thickness of the twelfth lens is 5.025+ -5%; the center thickness of the thirteenth lens is 5.562 +/-5%; the center thickness of the fourteenth lens is 3.175±5%; the fifteenth lens had a center thickness of 3.244.+ -. 5% and units of mm.
Preferably, the distance between the first lens and the second lens on the optical axis is 49.157 +/-5%; the distance between the second lens and the third lens on the optical axis is 59.836 +/-5%; the distance between the third lens and the fourth lens on the optical axis is 4.356+/-5%; the distance between the fourth lens and the fifth lens on the optical axis is 0.827 +/-5%; the distance between the fifth lens and the sixth lens on the optical axis is 0.592+/-5%; the distance between the sixth lens and the seventh lens on the optical axis is 6.257+/-5%; the distance between the seventh lens and the eighth lens on the optical axis is 13.616 +/-5%; the distance between the eighth lens and the ninth lens on the optical axis is 34.443 +/-5%; the distance between the ninth lens and the air space of the aperture diaphragm on the optical axis is 7.000+/-5%; the distance between the aperture diaphragm and the tenth lens on the optical axis is 3.915 +/-5%; the distance between the tenth lens and the eleventh lens on the optical axis is 7.870 +/-5%; the distance between the eleventh lens and the twelfth lens on the optical axis is 0.538+/-5%; the distance between the twelfth lens and the thirteenth lens on the optical axis is 6.221 +/-5%; the fourteenth lens and the fifteenth lens have a distance of 0.084±5% on the optical axis, and the unit of distance is millimeter.
Preferably, the refractive index of the first lens is 1.78; the refractive index of the second lens is 1.66; the refractive index of the third lens is 1.56; the refractive index of the fourth lens is 1.76; the refractive index of the fifth lens is 1.69; the refractive index of the sixth lens is 1.40; the refractive index of the seventh lens is 1.81; the refractive index of the eighth lens is 1.53; the refractive index of the ninth lens is 1.40; the refractive index of the tenth lens is 1.50; the refractive index of the eleventh lens is 1.53; the twelfth lens has a refractive index of 1.72; the thirteenth lens has a refractive index of 1.53; the fourteenth lens has a refractive index of 1.30; the refractive index of the fifteenth lens is 1.63.
Preferably, the abbe number of the first lens is 46.57±5%; the abbe number of the second lens is 60.37 +/-5%; the abbe number of the third lens is 81.59 +/-5%; the abbe number of the fourth lens is 48.24+/-5%; the abbe number of the fifth lens is 48.43 +/-5%; the abbe number of the sixth lens is 81.59 +/-5%; the abbe number of the seventh lens is 41.00 + -5%; the abbe number of the eighth lens is 61.25+ -5%; the abbe number of the ninth lens is 86.59 +/-5%; the abbe number of the tenth lens is 81.59 +/-5%; the abbe number of the eleventh lens is 46.92 +/-5%; the abbe number of the twelfth lens is 42.14+/-5%; the thirteenth lens has an Abbe number of 40.52 + -5%; the fourteenth lens has an abbe number of 581.56 + -5%; the abbe number of the fifteenth lens is 53.95±5%.
Preferably, the diameter of the first lens is 320mm.
The invention has the advantages and positive effects that:
the large-field double telecentric lens is formed by combining fifteen lenses, an optical path enters an optical system through a first lens, the first lens to a third lens mainly modulate light rays in a large field of view into the system and perform aberration compensation, the fourth lens to the twelfth lens mainly control aberration caused by overlarge field of view, and the thirteenth lens to the fifteenth lens determine the size of an imaging surface of the optical system; and each aberration of the lens in the maximum visual field range is provided with a corresponding lens or lens group, so that the performance optimization is more targeted and more effective. In the design of the large-view double telecentric lens, the maximum lens determines the view range, in order to meet the 300mm view detection range, the diameter design of the first lens reaches 320mm, meanwhile, the thirteenth lens and the fourteenth lens are used for gluing, so that distortion, spherical aberration and chromatic aberration caused by overlarge view range are reduced to the greatest extent, the contrast and resolution in the view range of the lens are improved, and overlarge error deviation during measurement in the large view range is avoided.
Drawings
FIG. 1 is a light path diagram of a preferred embodiment of the present invention;
FIG. 2 is an optical speckle pattern of a preferred embodiment of the present invention;
FIG. 3 is a graph of the modulation function MTF of a preferred embodiment of the present invention;
FIG. 4 is a graph of relative illuminance according to a preferred embodiment of the present invention;
fig. 5 is a field curvature and astigmatism diagram of a preferred embodiment of the invention.
Detailed Description
For a further understanding of the invention, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings in which:
the following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. Based on the technical solutions of the present invention, all other embodiments obtained by a person skilled in the art without making any creative effort fall within the protection scope of the present invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1, a large-field double telecentric lens mainly includes: an optical magnification group, an aperture stop imaging group; wherein:
the optical amplifying group consists of nine lenses, and the optical amplifying group sequentially comprises: a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8 and a ninth lens 9; the first lens is a convex-concave lens, the second lens is a convex-concave lens, the third lens is a biconvex lens, the fourth lens is a biconcave lens, the fifth lens is a convex-concave lens, the sixth lens is a biconvex lens, the seventh lens is a concave-flat lens, the eighth lens is a convex-concave lens, and the ninth lens is a concave-convex lens;
the aperture diaphragm APE is positioned between the optical amplifying group and the imaging group;
the imaging group consists of five lenses, and the imaging group comprises the following components along the light path: a tenth lens 10, an eleventh lens 11, a twelfth lens 12, a thirteenth lens 13, a fourteenth lens 14, and a fifteenth lens 15; the tenth lens is a biconvex lens, the eleventh lens is a biconcave lens, the twelfth lens is a concave-convex lens, the thirteenth lens is a biconcave lens, the fourteenth lens is a biconvex lens, and the fifteenth lens is a biconvex lens; the thirteenth lens and the fourteenth lens are cemented with each other.
Fifteen lenses are in coaxial relationship;
a midpoint between the thirteenth lens and the fourteenth lens is coated with a photosensitive paste.
Radius of curvature of each lens composing the large-field double telecentric lens optical path: the curvature radius of the light incident surface of the first lens is 174.321 +/-5%, and the curvature radius of the light emergent surface is 771.423 +/-5%; the curvature radius of the light incident surface of the second lens is 113.643 +/-5%, and the curvature radius of the light emergent surface is 178.124 +/-5%; the curvature radius of the light incident surface of the third lens is 86.430 +/-5%, and the curvature radius of the light emergent surface is-489.657 +/-5%; the curvature radius of the light incident surface of the fourth lens is-113.886 +/-5%, and the curvature radius of the light emergent surface is 43.026 +/-5%; the curvature radius of the light incident surface of the fifth lens is 46.233 +/-5%, and the curvature radius of the light emergent surface is 57.143 +/-5%; the curvature radius of the light incident surface of the sixth lens is 74.256 +/-5%, and the curvature radius of the light emergent surface is-42.064 +/-5%; the curvature radius of the light incident surface of the seventh lens is-66.438 +/-5%, and the curvature radius of the light emergent surface is infinity; the curvature radius of the light incident surface of the eighth lens is 35.852 +/-5%, and the curvature radius of the light emergent surface is 26.333 +/-5%; the curvature radius of the light incident surface of the ninth lens is-75.566 +/-5%, and the curvature radius of the light emergent surface is-27.765 +/-5%; the radius of curvature of the light incident surface of the tenth lens is 13.787 +/-5%, and the radius of curvature of the light emergent surface is-324.567 +/-5%; the curvature radius of the light incident surface of the eleventh lens is-23.765 +/-5%, and the curvature radius of the light emergent surface is 15.875 +/-5%; the radius of curvature of the light incident surface of the twelfth lens is-186.446 +/-5%, and the radius of curvature of the light emergent surface is-16.757 +/-5%; the curvature radius of the light incident surface of the thirteenth lens is-6.246 +/-5%, and the curvature radius of the light emergent surface is 46.967 +/-5%; the radius of curvature of the light incident surface of the fourteenth lens is 46.965 +/-5%, and the radius of curvature of the light emergent surface is-16.665 +/-5%; the radius of curvature of the light incident surface of the fifteenth lens is 66.356 +/-5%, and the radius of curvature of the light emergent surface is-26.286 +/-5%. The radius of curvature is in millimeters.
Center thickness of each lens constituting the large-field double telecentric lens: the center thickness of the first lens is 10.164 +/-5%; the center thickness of the second lens is 10.018 +/-5%; the center thickness of the third lens is 13.872 +/-5%; the center thickness of the fourth lens is 9.057 +/-5%; the center thickness of the fifth lens is 10.027 +/-5%; the center thickness of the sixth lens is 11.176+ -5%; the center thickness of the seventh lens is 2.981 +/-5%; the center thickness of the eighth lens is 3.977 +/-5%; the center thickness of the ninth lens is 5.983 +/-5%; the center thickness of the tenth lens is 5.026 +/-5%; the center thickness of the eleventh lens is 5.297 +/-5%; the center thickness of the twelfth lens is 5.025+ -5%; the center thickness of the thirteenth lens is 5.562 +/-5%; the center thickness of the fourteenth lens is 3.175±5%; the center thickness of the fifteenth lens was 3.244 ±5%. The center thickness of the lens is in millimeters.
Object and lens, lens and aperture diaphragm and lens and image plane air interval distance between them forming large-field double telecentric lens light path: the object is spaced from the air of the first lens by 169 + -5% on the optical axis; the distance between the air spaces of the first lens and the second lens on the optical axis is 49.157 +/-5%; the distance between the air spaces of the second lens and the third lens on the optical axis is 59.836 +/-5%; the distance between the air spaces of the third lens and the fourth lens on the optical axis is 4.356+/-5%; the distance between the air spaces of the fourth lens and the fifth lens on the optical axis is 0.827 +/-5%; the distance between the air space of the fifth lens and the air space of the sixth lens on the optical axis is 0.592+/-5%; the distance between the air space of the sixth lens and the seventh lens on the optical axis is 6.257+/-5%; the distance between the seventh lens and the eighth lens on the optical axis is 13.616 +/-5%; the distance between the air space of the eighth lens and the air space of the ninth lens on the optical axis is 34.443 +/-5%; the distance between the ninth lens and the air space of the aperture diaphragm on the optical axis is 7.000+/-5%; the distance between the aperture diaphragm and the air space of the tenth lens on the optical axis is 3.915 +/-5%; the distance between the air space of the tenth lens and the eleventh lens on the optical axis is 7.870 +/-5%; the distance between the air gap of the eleventh lens and the twelfth lens on the optical axis is 0.538+/-5%; the distance between the air space of the twelfth lens and the thirteenth lens on the optical axis is 6.221 +/-5%; the thirteenth lens and the fourteenth lens are double-glued without air space; the air gap between the fourteenth lens and the fifteenth lens is 0.084±5% on the optical axis. All air spaces are spaced apart on the optical axis in millimeters.
Refractive index and abbe number of each lens composing the large-field double telecentric lens light path: the refractive index and Abbe number of the first lens are 1.78/46.57+ -5%; the refractive index and Abbe number of the second lens are 1.66/60.37 +/-5%; the refractive index and Abbe number of the third lens are 1.56/81.59 +/-5%; the refractive index and Abbe number of the fourth lens are 1.76/48.24+/-5%; the refractive index and Abbe number of the fifth lens are 1.69/48.43 +/-5%; the refractive index and Abbe number of the sixth lens are 1.40/81.59 + -5%; the refractive index and Abbe number of the seventh lens are 1.81/41.00+ -5%; the refractive index and Abbe number of the eighth lens are 1.53/61.25+ -5%; the refractive index and Abbe number of the ninth lens are 1.40/86.59 + -5%; the refractive index and Abbe number of the tenth lens are 1.50/81.59 + -5%; the refractive index and Abbe number of the eleventh lens are 1.53/46.92 + -5%; the refractive index and Abbe number of the twelfth lens are 1.72/42.14+ -5%; the refractive index and Abbe number of the thirteenth lens are 1.53/40.52 + -5%; the refractive index and Abbe number of the fourteenth lens are 1.30/581.56 + -5%; the refractive index and Abbe number of the fifteenth lens were 1.63/53.95.+ -. 5%.
In the patent of the invention, the maximum visual field of the large-visual-field double telecentric lens is 300mm, the nearest working distance is 460mm, the working wave band 486-656nm, and the distance from the object surface to the image surface is 467mm.
From the optical speckle pattern, it can be seen that: where RMS RADIUS represents the root mean square RADIUS of the diffuse speck, GEO RADIUS represents the airy speck RADIUS, all in microns. As shown in FIG. 2, the center field of view has an Airy radius of 3.160 μm and a root mean square radius of 1.483. Mu.m; the radius of the Airy spot of 1/2 field of view is 4.376 mu m, and the root mean square radius is 1.642 mu m; the radius of the Airy spot of the 4/5 field of view is 4.224 mu m, and the root mean square radius is 1.788 mu m; the radius of the Airy spot of the edge view field is 5.178 mu m, the root mean square radius is 2.270 mu m, the design requirement standard is met, the energy concentration and aberration correction of the on-axis and off-axis points are very good, and the ideal resolution is achieved.
From the modulation function MTF diagram, it can be seen that: the abscissa is the spatial resolution in line pairs per millimeter, the ordinate is the contrast, the range is 0-1, and TS represents the meridian and sagittal components of MTF at different fields. As shown in fig. 3, the MTF values of each field of view show a contrast ratio of greater than 0.65 at 60 line pairs/mm, and the entire MTF curve is relatively compact, and it can be seen that the lens performs well in terms of contrast and resolution.
From the relative illuminance map, it can be seen that: the Y field angle is on the abscissa, the relative illuminance is on the ordinate from the center market to the edge market, the value range is 0-1, and the following Wavelength represents the center Wavelength of 0.585 μm through the lens optical path. As shown in fig. 4, within 0.5 field of view, the relative illuminance nearly coincides with 1, indicating that there is little loss of light from the center field of view object; in the marginal view field, the relative illuminance is still kept above 0.6, and the lens can be seen to be good in the relative illuminance.
From the field curvature and astigmatism diagrams, it can be seen that: the ordinate is the field of view and the abscissa is in microns.
From the distortion map, it can be seen that: the ordinate is the field of view and the abscissa is the distortion value. As can be seen from fig. 5, the distortion value of the lens in the full field of view is less than 0.01%, and the lens has an extremely low distortion value.
To sum up: the large-field double-telecentric lens designed by the invention has a very large measuring range, has very high contrast and resolution and very low distortion rate in the measuring range of a large field, and meets the high-precision measuring requirement of a large object.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the invention in any way, but any simple modification, equivalent variation and modification of the above embodiments according to the technical principles of the present invention are within the scope of the technical solutions of the present invention.
Claims (7)
1. The large-field double telecentric lens sequentially comprises an optical amplifying group, an aperture diaphragm and an imaging group along an optical path; the method is characterized in that:
the optical amplifying group consists of nine lenses, and the optical amplifying group sequentially comprises: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens; the first lens is a convex-concave lens, the second lens is a convex-concave lens, the third lens is a biconvex lens, the fourth lens is a biconcave lens, the fifth lens is a convex-concave lens, the sixth lens is a biconvex lens, the seventh lens is a concave-flat lens, the eighth lens is a convex-concave lens, and the ninth lens is a concave-convex lens;
the aperture diaphragm is positioned between the optical amplifying group and the imaging group;
the imaging group consists of five lenses, and the imaging group comprises the following components along the light path: tenth, eleventh, twelfth, thirteenth, fourteenth and fifteenth lenses; the tenth lens is a biconvex lens, the eleventh lens is a biconcave lens, the twelfth lens is a concave-convex lens, the thirteenth lens is a biconcave lens, the fourteenth lens is a biconvex lens, and the fifteenth lens is a biconvex lens; the thirteenth lens and the fourteenth lens are cemented with each other.
2. The large field double telecentric lens according to claim 1, wherein:
the curvature radius of the light incident surface of the first lens is 174.321 +/-5%, and the curvature radius of the light emergent surface is 771.423 +/-5%;
the curvature radius of the light incident surface of the second lens is 113.643 +/-5%, and the curvature radius of the light emergent surface is 178.124 +/-5%;
the curvature radius of the light incident surface of the third lens is 86.430 +/-5%, and the curvature radius of the light emergent surface is-489.657 +/-5%;
the curvature radius of the light incident surface of the fourth lens is-113.886 +/-5%, and the curvature radius of the light emergent surface is 43.026 +/-5%;
the curvature radius of the light incident surface of the fifth lens is 46.233 +/-5%, and the curvature radius of the light emergent surface is 57.143 +/-5%;
the curvature radius of the light incident surface of the sixth lens is 74.256 +/-5%, and the curvature radius of the light emergent surface is-42.064 +/-5%;
the curvature radius of the light incident surface of the seventh lens is-66.438 +/-5%, and the curvature radius of the light emergent surface is infinity;
the curvature radius of the light incident surface of the eighth lens is 35.852 +/-5%, and the curvature radius of the light emergent surface is 26.333 +/-5%;
the curvature radius of the light incident surface of the ninth lens is-75.566 +/-5%, and the curvature radius of the light emergent surface is-27.765 +/-5%;
the radius of curvature of the light incident surface of the tenth lens is 13.787 +/-5%, and the radius of curvature of the light emergent surface is-324.567 +/-5%;
the curvature radius of the light incident surface of the eleventh lens is-23.765 +/-5%, and the curvature radius of the light emergent surface is 15.875 +/-5%;
the radius of curvature of the light incident surface of the twelfth lens is-186.446 +/-5%, and the radius of curvature of the light emergent surface is-16.757 +/-5%;
the curvature radius of the light incident surface of the thirteenth lens is-6.246 +/-5%, and the curvature radius of the light emergent surface is 46.967 +/-5%;
the radius of curvature of the light incident surface of the fourteenth lens is 46.965 +/-5%, and the radius of curvature of the light emergent surface is-16.665 +/-5%;
the radius of curvature of the light incident surface of the fifteenth lens is 66.356 +/-5%, and the radius of curvature of the light emergent surface is-26.286 +/-5%;
the units are all millimeters.
3. The large field double telecentric lens according to claim 1, wherein: the center thickness of the first lens is 10.164 +/-5%; the center thickness of the second lens is 10.018 +/-5%; the center thickness of the third lens is 13.872 +/-5%; the center thickness of the fourth lens is 9.057 +/-5%; the center thickness of the fifth lens is 10.027 +/-5%; the center thickness of the sixth lens is 11.176+ -5%; the center thickness of the seventh lens is 2.981 +/-5%; the center thickness of the eighth lens is 3.977 +/-5%; the center thickness of the ninth lens is 5.983 +/-5%; the center thickness of the tenth lens is 5.026 +/-5%; the center thickness of the eleventh lens is 5.297 +/-5%; the center thickness of the twelfth lens is 5.025+ -5%; the center thickness of the thirteenth lens is 5.562 +/-5%; the center thickness of the fourteenth lens is 3.175±5%; the fifteenth lens had a center thickness of 3.244.+ -. 5% and units of mm.
4. The large field double telecentric lens of claim 1 wherein the first lens and the second lens are located at a distance of 49.157 ±5% on the optical axis; the distance between the second lens and the third lens on the optical axis is 59.836 +/-5%; the distance between the third lens and the fourth lens on the optical axis is 4.356+/-5%; the distance between the fourth lens and the fifth lens on the optical axis is 0.827 +/-5%; the distance between the fifth lens and the sixth lens on the optical axis is 0.592+/-5%; the distance between the sixth lens and the seventh lens on the optical axis is 6.257+/-5%; the distance between the seventh lens and the eighth lens on the optical axis is 13.616 +/-5%; the distance between the eighth lens and the ninth lens on the optical axis is 34.443 +/-5%; the distance between the ninth lens and the air space of the aperture diaphragm on the optical axis is 7.000+/-5%; the distance between the aperture diaphragm and the tenth lens on the optical axis is 3.915 +/-5%; the distance between the tenth lens and the eleventh lens on the optical axis is 7.870 +/-5%; the distance between the eleventh lens and the twelfth lens on the optical axis is 0.538+/-5%; the distance between the twelfth lens and the thirteenth lens on the optical axis is 6.221 +/-5%; the fourteenth lens and the fifteenth lens have a distance of 0.084±5% on the optical axis, and the unit of distance is millimeter.
5. The large field double telecentric lens of claim 1 wherein the refractive index of the first lens is 1.78; the refractive index of the second lens is 1.66; the refractive index of the third lens is 1.56; the refractive index of the fourth lens is 1.76; the refractive index of the fifth lens is 1.69; the refractive index of the sixth lens is 1.40; the refractive index of the seventh lens is 1.81; the refractive index of the eighth lens is 1.53; the refractive index of the ninth lens is 1.40; the refractive index of the tenth lens is 1.50; the refractive index of the eleventh lens is 1.53; the twelfth lens has a refractive index of 1.72; the thirteenth lens has a refractive index of 1.53; the fourteenth lens has a refractive index of 1.30; the refractive index of the fifteenth lens is 1.63.
6. The large field double telecentric lens of claim 1 wherein the abbe number of the first lens is 46.57 ± 5%; the abbe number of the second lens is 60.37 +/-5%; the abbe number of the third lens is 81.59 +/-5%; the abbe number of the fourth lens is 48.24+/-5%; the abbe number of the fifth lens is 48.43 +/-5%; the abbe number of the sixth lens is 81.59 +/-5%; the abbe number of the seventh lens is 41.00 + -5%; the abbe number of the eighth lens is 61.25+ -5%; the abbe number of the ninth lens is 86.59 +/-5%; the abbe number of the tenth lens is 81.59 +/-5%; the abbe number of the eleventh lens is 46.92 +/-5%; the abbe number of the twelfth lens is 42.14+/-5%; the thirteenth lens has an Abbe number of 40.52 + -5%; the fourteenth lens has an abbe number of 581.56 + -5%; the abbe number of the fifteenth lens is 53.95±5%.
7. The large field double telecentric lens of claim 1 wherein said first lens has a diameter of 320mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310433221.7A CN116381914A (en) | 2023-04-21 | 2023-04-21 | Large-field double telecentric lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310433221.7A CN116381914A (en) | 2023-04-21 | 2023-04-21 | Large-field double telecentric lens |
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|---|---|
| CN116381914A true CN116381914A (en) | 2023-07-04 |
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| CN202310433221.7A Pending CN116381914A (en) | 2023-04-21 | 2023-04-21 | Large-field double telecentric lens |
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| CN (1) | CN116381914A (en) |
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