8 results about "Entire lens" patented technology

The aperture aperture calibration and testing system and method provided in this application describe a system where a control module controls an aperture motor via signals. The aperture motor adjusts the aperture mechanism to form the light-transmitting aperture. A camera captures an image of the light-transmitting aperture. The control module processes the image to calculate the actual light-transmitting diameter, and then uses optical formulas to calculate the aperture F-number. This eliminates the need for measurement in imaging instruments or optical test stands, resulting in a small, low-cost system that facilitates rapid deployment and mass production on production lines. The system employs an independent testing architecture, directly driving and testing the aperture mechanism without requiring the assembly of the entire lens, thus improving testing flexibility. The method describes adjusting the aperture aperture with the aperture motor, recording the motor's step count, obtaining the actual light-transmitting diameter through image processing, and calculating the aperture F-number by combining the camera's focal length with the actual light-transmitting diameter, achieving measurement without the need for testing equipment.

This invention discloses an optical system for a large-aperture APS-C fixed-focus lens. The optical system comprises a first objective lens group, a second objective lens group, and a third objective lens group arranged sequentially from the object side to the image side along the optical axis. The first objective lens group includes an aperture stop. During focusing, the second objective lens group moves along the optical axis towards the object side, while the positions of the first objective lens group, the aperture stop, and the third objective lens group relative to the image plane remain unchanged. This large-aperture APS-C fixed-focus lens optical system optimizes light refraction and convergence, balances aberrations, and improves image quality by setting the positive and negative optical powers of each lens group and the ratio between the combined focal length of each lens group and the combined focal length of the entire lens. This further enables the lens to achieve higher image quality.

An Optico-dynamic Light Tunnel is provided. This apparatus provides visual assessment of the entire pathway of a lens field. This apparatus may include linear strands of light that can be created and their propagation pathways visualized. This apparatus may stratify light strands to create an optical tunnel. This apparatus may apply this optical tunnel to lens objects to dynamically analyze optical properties over the entire lens field pathway and in multiple dimensions.

This utility model discloses an LED lamp bead for an anti-sulfurization display screen, comprising: a support frame, a light-emitting component, a lens cover, and a mounting assembly. The light-emitting component is disposed on the top of the support frame, and the lens cover is disposed on the top of the support frame. The mounting assembly includes a first threaded ring fixedly connected to the bottom of the lens cover, a second threaded ring sleeved on the outer wall of the support frame, and a connecting ring threadedly sleeved on the outer wall of the second threaded ring. The connecting ring is threadedly sleeved on the outer wall of the first threaded ring. Through the design of the first threaded ring, the second threaded ring, the connecting ring, and the limiting component, the connecting ring is connected to the support frame via the second threaded ring, and the connecting ring is connected to the lens cover via the first threaded ring. This design allows the lens cover to be disassembled from the support frame. When the lens cover is damaged, it can be directly replaced, avoiding the need to replace the entire lens cover due to damage.

This invention relates to the field of optical lens technology, and more particularly to an optical system for a large-aperture full-frame fixed-focus lens. It includes a first objective lens group, a second objective lens group, and a third objective lens group arranged sequentially from the object side to the image side along the optical axis. The third objective lens group includes an aperture stop. During focusing, the second objective lens group moves along the optical axis to the image side, while the positions of the first objective lens group, the aperture stop, and the third objective lens group relative to the image plane remain unchanged. This invention's optical system for a large-aperture full-frame fixed-focus lens optimizes light refraction and convergence, balances aberrations, and improves image quality by setting the positive and negative optical powers of each lens group and the ratio between the combined focal length of each lens group and the combined focal length of the entire lens. This further enables the lens to achieve higher image quality.

A rearview device (102, 104) for a vehicle (100) includes a mirror base (204, 1802, 2302, 2304) providing a first attachment end for attachment to a side of the vehicle and a second attachment end for an actuator (402, 1602, 2408, 3408). The rearview device also includes a lens portion (206, 2406) including an actuator for moving the entire lens portion. For this purpose, the tilting shaft (532, 5320) of the actuator is adapted to be fixedly attached to a lower housing portion (602, 1502) and / or a housing frame (802, 1102, 1302, 1702), and / or the hinge (506, 3506, 4506) of the actuator is adapted to be engaged by complementary hinges (806, 1106, 1303) of the housing frame. Alternatively, the actuator is associated with a housing (518, 1604, 2402) for attaching the actuator, thereby creating a seal on the lens section. An additional seal is created by attaching the lens section to the lens base.

This invention discloses a cryogenic drift lidar receiving lens, characterized by consisting of a front aperture group with positive optical power and a rear aperture group with positive optical power from the object plane to the image plane, wherein the focal length f of the front aperture group is... f Satisfy: 15mm≤f f ≤22mm, the focal length f of the rear group of the aperture stop b Satisfies: 21mm≤f b The focal length f of the entire lens satisfies: 14mm≤f≤17mm, the working F-number F# of the entire lens satisfies: 1.4≤F#≤1.5, the total optical length TTL satisfies: 30mm≤TTL≤36mm, and the relationship between the total optical length TTL and the focal length f satisfies: 1.7≤|TTL / f|≤2.6. By reasonably allocating the curvature radius and optical power of the lens elements, higher-order aberrations can be eliminated, and high-definition imaging of distant targets can be achieved over a wide temperature range.

The embodiment of the present application discloses a wide-angle camera lens. The wide-angle camera lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence along an optical axis from an object plane to an image plane; the first lens has positive refractive power, the second lens has positive refractive power, the third lens has negative refractive power, the fourth lens has negative refractive power, the fifth lens has positive refractive power, and the sixth lens has positive refractive power. The embodiment of the present application is configured or approximately configured as a traditional double-Gaussian symmetric optical system, so that the light ray trend and the refraction angle of the object side and the image side space are symmetrical, and the refractive power of the front and rear symmetrical lenses is matched, and the reasonable air gap adjustment of different lens pieces and the optimization of the lens aperture are matched, which helps to effectively correct the aberration, realize small distortion, small chromatic aberration and low field curvature, and helps to compress the front and rear lengths of the whole lens and reduce the volume of the whole lens.