CN215181167U - Small-size vehicle-mounted TOF lens - Google Patents
Small-size vehicle-mounted TOF lens Download PDFInfo
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- CN215181167U CN215181167U CN202121499694.XU CN202121499694U CN215181167U CN 215181167 U CN215181167 U CN 215181167U CN 202121499694 U CN202121499694 U CN 202121499694U CN 215181167 U CN215181167 U CN 215181167U
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Abstract
The utility model provides an on-vehicle TOF camera lens of little volume, it integrates the equipment with the lens for simple structure, small, the total length is less than 10mm, makes the distortion little, with low costs. The zoom lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in this order from an object side to an image side along an optical axis; the first lens is a negative lens which has negative focal power and a concave image side surface; the second lens is a positive lens with positive focal power; the fourth lens is a negative lens having a negative focal power; the fifth lens is a positive lens with positive focal power; it also includes a diaphragm.
Description
Technical Field
The utility model relates to a technical field of camera lens structure specifically is an on-vehicle TOF camera lens of little volume.
Background
In recent years, with the development of automobile systems and the fields of industry and 3D depth imaging, the technical requirements for cameras for vehicles and lenses for industry and 3D depth imaging are becoming higher and higher. The tof (time of flight) lens is an important component of lenses in the fields of automobile systems, industry and 3D depth imaging, and can identify two-dimensional information and 3D depth information. However, the total length of the conventional vehicle-mounted tof (time of flight) lens generally exceeds 13mm, and the conventional vehicle-mounted tof lens is large in size, high in cost and not beneficial to the miniaturization and installation of the imaging module on the automobile.
Disclosure of Invention
To the problem, the utility model provides a small-size on-vehicle TOF camera lens, it integrates the equipment with the lens for simple structure, small, the total length is less than 10mm, makes the distortion little, with low costs.
The utility model provides a vehicle-mounted TOF lens of little volume which characterized in that: the zoom lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in this order from an object side to an image side along an optical axis;
the first lens is a negative lens which has negative focal power and a concave image side surface;
the second lens is a positive lens with positive focal power;
the fourth lens is a negative lens having a negative focal power;
the fifth lens is a positive lens with positive focal power;
it also includes a diaphragm.
It is further characterized in that:
at least one piece of protective glass and an image plane IMA are sequentially arranged behind the image side of the fifth lens;
the fourth lens and the fifth lens form a cemented lens or a separated lens;
the object side surface of the third lens is a concave surface or a convex surface;
the image side surface of the fifth lens is a concave surface or a convex surface;
the difference of the abbe numbers V of at least two adjacent lenses satisfies: 20 < | Va-Vb | < 35, wherein Va and Vb are Abbe number values corresponding to two adjacent lenses;
the vehicle-mounted TOF lens meets the conditions: BFL/TTL is less than or equal to 0.35, wherein BFL is the distance from the center of the image side surface of the last lens of the vehicle-mounted TOF lens to the imaging surface of the optical lens on the optical axis; and TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the vehicle-mounted TOF lens on the optical axis;
the vehicle-mounted TOF lens meets the conditions: the FOV/h/D is more than or equal to 2.5 and less than or equal to 3, wherein the FOV is the maximum field angle of the vehicle-mounted TOF lens; d is the maximum light passing aperture of the object side surface of the first lens corresponding to the maximum field angle of the vehicle-mounted TOF lens; h is the image height corresponding to the maximum field angle of the vehicle-mounted TOF lens;
the maximum view field angle FOV of the vehicle-mounted TOF lens, the whole group of focal length values f of the vehicle-mounted TOF lens and the image height h corresponding to the maximum view field angle of the vehicle-mounted TOF lens meet the following conditions: the FOV xf/h is more than or equal to 25 and less than or equal to 32;
the vehicle-mounted TOF lens meets the conditions: TTL/f is not less than 3.6 and not more than 4.55, wherein TTL is the distance between the center of the object side surface of the first lens and the imaging surface of the vehicle-mounted TOF lens on the optical axis, and f is the whole group of focal length values of the vehicle-mounted TOF lens.
The vehicle-mounted TOF lens meets the conditions: f1/f is more than or equal to 1.7 and less than or equal to-1.4, f3/f is more than or equal to 1.4 and less than or equal to 1.9, and f5/f is more than or equal to 1.45 and less than or equal to 2.5; wherein f1, f3 and f5 are focal lengths of the first lens, the third lens and the fifth lens in sequence.
Adopt the utility model discloses afterwards, it adopts five lens combinations, and the thickness and the parameter cooperation combination of every lens form the TOF camera lens that the total length is less than 10mm, and its performance satisfies the requirement, and the distortion is little, and is with low costs, can realize at-40 to 105 within ranges clear imaging.
Drawings
Fig. 1 is a combined view of a lens structure according to a first embodiment of the present invention (where an object space is at the leftmost position, and an image space is at the rightmost position);
fig. 2 is a combined view of a lens structure according to a second embodiment of the present invention (where the object space is at the leftmost position and the image space is at the rightmost position);
fig. 3 is a combined view of the lens structure according to the third embodiment of the present invention (the object side is at the leftmost position, and the image side is at the rightmost position);
fig. 4 is a combined view of a lens structure according to a fourth embodiment of the present invention (where the object space is at the leftmost position, and the image space is at the rightmost position);
fig. 5 is a combined view of a lens structure according to a fifth embodiment of the present invention (where the object space is at the leftmost position, and the image space is at the rightmost position);
the names corresponding to the sequence numbers in the figure are as follows:
the lens comprises a first lens 1, a second lens 2, a third lens 3, a fourth lens 4 and a fifth lens 5.
Detailed Description
A small volume on-board TOF lens, see fig. 1-5: a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, which are arranged in order from an object side to an image side along an optical axis;
the first lens 1 is a negative lens which has negative focal power and a concave image side surface;
the second lens 2 is a positive lens having a positive refractive power;
the fourth lens 4 is a negative lens having a negative power;
the fifth lens 5 is a positive lens having a positive power;
it also includes a diaphragm.
The overall parameter performance meets the following conditions:
a. the difference between the abbe numbers Va and Vb of at least two adjacent lenses satisfies: 20 < | Va-Vb | < 35, wherein Va and Vb are Abbe number values corresponding to two adjacent lenses;
b. BFL/TTL is less than or equal to 0.35, wherein BFL is the distance from the center of the image side surface of the last lens of the vehicle-mounted TOF lens to the optical axis of the imaging surface of the optical lens; TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the vehicle-mounted TOF lens on the optical axis;
c. the FOV/h/D is more than or equal to 2.5 and less than or equal to 3, wherein the FOV is the maximum field angle of the vehicle-mounted TOF lens; d is the maximum light passing aperture of the object side surface of the first lens corresponding to the maximum field angle of the vehicle-mounted TOF lens; h is the image height corresponding to the maximum field angle of the vehicle-mounted TOF lens;
d. the maximum view field angle FOV of the vehicle-mounted TOF lens, the whole group of focal length values f of the vehicle-mounted TOF lens and the image height h corresponding to the maximum view field angle of the vehicle-mounted TOF lens meet the following requirements: the FOV xf/h is more than or equal to 25 and less than or equal to 32;
e. TTL/f is not less than 3.6 and not more than 4.55, wherein TTL is the distance between the center of the object side surface of the first lens and the imaging surface of the vehicle-mounted TOF lens on the optical axis, and f is the whole group focal length value of the vehicle-mounted TOF lens.
f. F1/f is more than or equal to 1.7 and less than or equal to-1.4, f3/f is more than or equal to 1.4 and less than or equal to 1.9, and f5/f is more than or equal to 1.45 and less than or equal to 2.5; wherein f1, f3 and f5 are focal lengths of the first lens, the third lens and the fifth lens in sequence.
In the first embodiment, the structure is shown in fig. 1: the optical lens comprises a first lens, a diaphragm, a second lens, a third lens, a fourth lens, a fifth lens, a color filter, protective glass and an image plane IMA which are sequentially arranged along the incident direction of an optical axis from left to right, wherein the optical parameters are as shown in Table 1:
TABLE 1
When the radii of curvature of the surfaces of the diaphragm, the IR filter and the cover glass in Table 1 are Infinity, this surface is represented as a plane.
In this embodiment, the aspherical surface has the following surface equation:
wherein z is a distance vector from a vertex of the aspheric surface when the aspheric surface is at a position having a height of R along the optical axis direction, c is a curvature of a paraxial region of the aspheric surface, c is 1/R, R is a curvature radius, c is a reciprocal of the curvature radius, k is a conic coefficient, a1 is a2 nd order aspheric coefficient, a2 is a4 th order aspheric coefficient, a3 is a6 th order aspheric coefficient, a4 is an 8 th order aspheric coefficient, a5 is a 10 th order aspheric coefficient, a6 is a 12 th order aspheric coefficient, a7 is a 14 th order aspheric coefficient, and a8 is a 16 th order aspheric coefficient.
The optical parameters of the first embodiment are shown in table 2:
TABLE 2
| Number of noodles | K | a1 | a2 | a3 | a4 | a5 | | a7 | a8 | |
| 1 | 0.122 | -6.07E-02 | 5.17E-03 | 3.67E-04 | -1.43E-04 | -9.86E-07 | -1.44E-07 | 9.12E-09 | 0.00E+00 | |
| 2 | 0.477 | -9.51E-02 | -3.73E-03 | 1.40E-03 | 1.88E-04 | -1.38E-04 | -1.11E-04 | -1.12E-04 | 0.00E+00 | |
| 4 | 49.409 | -3.28E-02 | -1.11E-02 | 5.06E-03 | -1.68E-03 | -3.55E-04 | -5.77E-06 | 2.08E-05 | 0.00E+00 | |
| 5 | 1.948 | -1.72E-02 | -1.22E-02 | 7.58E-03 | -1.88E-03 | 1.97E-05 | -2.75E-05 | -1.19E-05 | 0.00E+00 | |
| 8 | 2.660 | -1.42E-02 | 9.84E-04 | -3.36E-04 | 5.08E-05 | 4.92E-07 | -4.04E-07 | 1.15E-08 | 0.00E+00 | |
| 9 | 2.082 | -1.98E-02 | 3.57E-03 | -3.32E-04 | -1.86E-05 | 4.45E-06 | 3.65E-08 | 5.27E-09 | 0.00E+00 | |
| 10 | 3.837 | -5.92E-03 | 3.24E-03 | -2.42E-04 | -1.44E-05 | 1.13E-06 | -1.34E-07 | 2.95E-08 | 0.00E+00 | |
| 11 | 50.100 | -2.87E-03 | 5.36E-04 | 2.86E-04 | -4.64E-05 | 2.09E-06 | 7.37E-08 | -3.12E-08 | 0.00E+00 |
In the second embodiment, the structure is shown in fig. 2: the optical lens comprises a first lens, a diaphragm, a second lens, a third lens, a fourth lens, a fifth lens, a color filter, protective glass and an image plane IMA which are sequentially arranged along the incident direction of an optical axis from left to right, wherein the optical parameters are as shown in Table 3:
TABLE 3
The coefficients of the aspherical surface equation in the second embodiment are shown in table 4:
TABLE 4
| Number of noodles | K | a1 | a2 | a3 | a4 | a5 | a6 | a7 | a8 |
| S1 | 1.00E+00 | -2.19E-02 | 1.72E-03 | -3.16E-04 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S2 | -8.41E-02 | -3.37E-02 | 7.65E-03 | -1.33E-02 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S3 | -3.77E+00 | -9.76E-03 | -8.83E-03 | 9.66E-03 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S4 | -3.56E+01 | -1.74E-02 | 2.32E-03 | 1.26E-03 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S7 | -4.22E+00 | -2.28E-02 | 1.35E-03 | 3.15E-04 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S8 | -2.80E+00 | -2.08E-02 | 3.05E-03 | 2.48E-06 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S9 | -1.45E+00 | -6.77E-03 | 2.97E-03 | -1.22E-04 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S10 | -2.32E-01 | 1.32E-02 | -5.10E-04 | 4.80E-04 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
In the third embodiment, the structure is shown in fig. 3: it includes that along the optical axis from left right incidence direction set gradually first lens, diaphragm, second lens, third lens, fourth lens, fifth lens, protective glass, image plane IMA, each optical parameter as table 5:
TABLE 5
The coefficients of the equation for the aspherical surface in the third embodiment are shown in table 6:
TABLE 6
In the fourth embodiment, the structure is shown in fig. 4: it includes that along the optical axis from left right incidence direction set gradually first lens, diaphragm, second lens, third lens, fourth lens, fifth lens, protective glass, image plane IMA, each optical parameter as table 7:
TABLE 7
The coefficients of the equation for the aspherical surface in the fourth embodiment are shown in table 8:
TABLE 8
| Number of noodles | K | a1 | a2 | a3 | a4 | a5 | a6 | a7 | a8 |
| S3 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S4 | -1.08E+01 | -6.96E-02 | 7.67E-03 | -5.98E-03 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S5 | -1.57E+01 | -2.57E-02 | 2.54E-04 | 5.49E-04 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S8 | -6.53E+00 | -2.99E-02 | 1.97E-03 | 1.00E-04 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S9 | -3.39E+00 | -2.21E-02 | 1.08E-03 | -2.63E-05 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S10 | -1.16E+00 | -9.76E-03 | 2.02E-03 | 8.74E-05 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S11 | 3.87E-01 | 1.91E-02 | -1.46E-03 | 1.23E-03 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
In the fifth embodiment, the structure is shown in fig. 5: it includes that setting gradually diaphragm, first lens, second lens, third lens, fourth lens, fifth lens, protective glass, image plane IMA along the optical axis from left right incidence direction, each optical parameter is as shown in Table 9:
TABLE 9
The coefficients of the aspherical surface equation in the second embodiment are shown in table 10:
watch 10
| Number of noodles | K | a1 | a2 | a3 | a4 | a5 | a6 | a7 | a8 |
| S1 | -3.10E+01 | 2.98E-02 | -7.81E-03 | 1.53E-03 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S2 | 2.13E+01 | 9.61E-02 | -3.46E-02 | 1.01E-02 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S3 | -1.45E+01 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S4 | -1.25E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S7 | -5.07E+00 | 7.39E-03 | -8.45E-04 | 5.94E-05 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S8 | -3.47E+00 | -4.16E-03 | -8.79E-04 | 1.18E-04 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S9 | -5.20E+00 | 1.34E-02 | -3.00E-03 | 2.38E-04 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
| S10 | 1.17E+01 | 6.87E-03 | -2.67E-03 | 2.55E-04 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 | 0.00E+00 |
The TOF lens adopts a combination of five lenses, the thickness and parameters of each lens are matched and combined to form the TOF lens with the total length less than 10mm, the performance of the TOF lens meets the requirements, the distortion is small, the cost is low, and clear imaging in the range of-40 degrees to 105 degrees can be realized.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The utility model provides a vehicle-mounted TOF lens of little volume which characterized in that: the zoom lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in this order from an object side to an image side along an optical axis;
the first lens is a negative lens which has negative focal power and a concave image side surface;
the second lens is a positive lens with positive focal power;
the fourth lens is a negative lens having a negative focal power;
the fifth lens is a positive lens with positive focal power;
it also includes a diaphragm.
2. A small-volume on-board TOF lens according to claim 1, wherein: and at least one piece of protective glass and an image plane IMA are sequentially arranged behind the image side of the fifth lens.
3. A small-volume on-board TOF lens according to claim 1, wherein: the fourth lens and the fifth lens form a cemented lens or a split lens.
4. A small-volume vehicle TOF lens according to claim 1 wherein the difference in abbe numbers V of at least two adjacent lenses satisfies: 20 < | Va-Vb | < 35, where Va and Vb are Abbe number values corresponding to two adjacent lenses.
5. A small-volume vehicle TOF lens according to claim 1 wherein the vehicle TOF lens satisfies the condition: BFL/TTL is less than or equal to 0.35, wherein BFL is the distance from the center of the image side surface of the last lens of the vehicle-mounted TOF lens to the imaging surface of the optical lens on the optical axis; and TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the vehicle-mounted TOF lens on the optical axis.
6. A small-volume vehicle-mounted TOF lens as claimed in claim 5 wherein vehicle-mounted TOF lens satisfies the condition: the FOV/h/D is more than or equal to 2.5 and less than or equal to 3, wherein the FOV is the maximum field angle of the vehicle-mounted TOF lens; d is the maximum light passing aperture of the object side surface of the first lens corresponding to the maximum field angle of the vehicle-mounted TOF lens; and h is the image height corresponding to the maximum field angle of the vehicle-mounted TOF lens.
7. The small-volume vehicle-mounted TOF lens as claimed in claim 1, wherein the maximum field of view angle FOV of the vehicle-mounted TOF lens, the whole set of focal length values f of the vehicle-mounted TOF lens and the image height h corresponding to the maximum field of view angle of the vehicle-mounted TOF lens satisfy: the FOV xf/h is more than or equal to 25 and less than or equal to 32.
8. A small-volume vehicle TOF lens according to claim 1, wherein said vehicle TOF lens satisfies the condition: TTL/f is not less than 3.6 and not more than 4.55, wherein TTL is the distance between the center of the object side surface of the first lens and the imaging surface of the vehicle-mounted TOF lens on the optical axis, and f is the whole group of focal length values of the vehicle-mounted TOF lens.
9. A small-volume vehicle TOF lens according to claim 8 wherein said vehicle TOF lens satisfies the condition: f1/f is more than or equal to 1.7 and less than or equal to-1.4, f3/f is more than or equal to 1.4 and less than or equal to 1.9, and f5/f is more than or equal to 1.45 and less than or equal to 2.5; wherein f1, f3 and f5 are focal lengths of the first lens, the third lens and the fifth lens in sequence.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121499694.XU CN215181167U (en) | 2021-07-01 | 2021-07-01 | Small-size vehicle-mounted TOF lens |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121499694.XU CN215181167U (en) | 2021-07-01 | 2021-07-01 | Small-size vehicle-mounted TOF lens |
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| CN215181167U true CN215181167U (en) | 2021-12-14 |
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