Optical lens
By using a specific optical power and shape design of an eight-lens structure, the problem of unclear images or small field of view of law enforcement recorder lenses has been solved, realizing an optical lens with a large field of view, large aperture, and high imaging quality, meeting the demand for clear images during law enforcement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIANGXI LIANCHUANG ELECTRONICS CO LTD
- Filing Date
- 2026-03-09
- Publication Date
- 2026-06-09
AI Technical Summary
When recording the scene, the images from the law enforcement recorder are unclear or the field of view is too small, making it impossible to record enough footage and meet the requirements for high imaging quality.
It employs an eight-lens structure, a combination of specific optical power and surface shape, including a combination of negative and positive optical power lenses. Through reasonable optical power allocation and lens shape design, it optimizes imaging quality, increases the field of view, and improves imaging quality.
It achieves a wide field of view, large aperture, miniaturization, and high imaging quality optical lens, which improves the imaging effect of the law enforcement recorder and meets the demand for clear images during law enforcement.
Smart Images
Figure CN122172418A_ABST
Abstract
Claims
1. An optical lens comprising eight lenses having optical power, characterized in that, It successively includes from the object side to the imaging surface along the optical axis: A first lens with a negative optical power, whose object side is convex and whose image side is concave; A second lens with a negative optical power; A third lens with a negative optical power; A fourth lens with a positive optical power; A fifth lens with a negative optical power, whose object side is concave near the optical axis and whose image side is concave; A sixth lens with a positive optical power, whose object side is convex and whose image side is convex; A seventh lens with a negative optical power, whose object side is concave and whose image side is convex; An eighth lens with a positive optical power; Wherein, the combined focal length f1234 of the first lens, the second lens, the third lens and the fourth lens and the effective focal length f of the optical lens satisfy: 1.8 < f1234 / f < 9.5; the curvature radius R13 of the object side of the seventh lens and the curvature radius R14 of the image side of the seventh lens satisfy: -1 < (R13 - R14) / (R13 + R14) < -0.
5.
2. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: the overall optical length TTL of the optical lens and the effective focal length f of the optical lens satisfy: 6.5 < TTL / f < 7.5; the overall optical length TTL of the optical lens and the true image height IH corresponding to the maximum field angle of the optical lens satisfy: 2.6 < TTL / IH < 2.
9.
3. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: the true image height IH corresponding to the maximum field angle of the optical lens and the effective focal length f of the optical lens satisfy: 2.4 < IH / f < 2.7; the overall optical length TTL of the optical lens, the true image height IH corresponding to the maximum field angle of the optical lens, and the maximum field angle FOV of the optical lens satisfy: 0.06 < 1°×TTL / (IH / 2) / (FOV / 2) < 0.
08.
4. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: the clear aperture radius d1 of the object side of the first lens, the true image height IH corresponding to the maximum field angle of the optical lens and the maximum field angle FOV of the optical lens satisfy: 0.21 < d1 / (IH / 2) / tan(FOV / 2) < 0.27; the true image height IH corresponding to the maximum field angle of the optical lens, the effective focal length f of the optical lens and the radian θ of the maximum half field angle of the optical lens satisfy: 0.89 < (IH / 2) / (f×θ) < 0.
94.
5. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: The effective focal length f of the optical lens and the focal length f1 of the first lens satisfy: -2 < f1 / f < -1.3; The effective focal length f of the optical lens and the focal length f3 of the third lens satisfy: -27 < f3 / f < -3.4; The effective focal length f of the optical lens and the focal length f4 of the fourth lens satisfy: 1.3 < f4 / f < 2.3; The effective focal length f of the optical lens and the focal length f5 of the fifth lens satisfy: -19 < f5 / f < -5.5; The effective focal length f of the optical lens and the focal length f6 of the sixth lens satisfy: 1 < f6 / f < 1.6; The effective focal length f of the optical lens and the focal length f8 of the eighth lens satisfy: 2.2 < f8 / f < 4.
2.
6. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: The effective focal length f of the optical lens and the focal length f2 of the second lens satisfy: -28 < f2 / f < -3.5; The curvature radius R3 of the object side surface of the second lens and the curvature radius R4 of the image side surface of the second lens satisfy: 0.4 < R3 / R4 < 1.
9.
7. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: The focal length f7 of the seventh lens and the effective focal length f of the optical lens satisfy: -1.8 < f7 / f < -1; The curvature radius R13 of the object side surface of the seventh lens and the effective focal length f of the optical lens satisfy: -1.2 < R13 / f < -0.8; The curvature radius R14 of the image side surface of the seventh lens and the effective focal length f of the optical lens satisfy: -40 < R14 / f < -2.
7.
8. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: The focal length f8 of the eighth lens and the combined focal length f5678 of the fifth, sixth, seventh, and eighth lenses satisfy: 0.8 < f8 / f5678 < 1.5; The focal length f1 of the first lens and the combined focal length f1234 of the first, second, third, and fourth lenses satisfy: -0.8 < f1 / f1234 < -0.
15.
9. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: The curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy: 0.5 < (R1 - R2) / (R1 + R2) < 0.8; The curvature radius R11 of the object side surface of the sixth lens and the curvature radius R12 of the image side surface of the sixth lens satisfy: 0.2 < (R11 + R12) / (R11 - R12) < 0.
6.
10. The optical lens according to claim 1, characterized in that, The optical lens satisfies one or more of the following conditional expressions: The combined focal length f1234 of the first lens, the second lens, the third lens, and the fourth lens and the effective focal length f of the optical lens satisfy: 1.99 < f1234 / f < 8.95; The object-side curvature radius R13 of the seventh lens and the image-side curvature radius R14 of the seventh lens satisfy: -0.95 < (R13 - R14) / (R13 + R14) < -0.52.