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Optical system, camera module and terminal equipment

An optical system and optical axis technology, applied in optics, optical components, instruments, etc., can solve the problems of eyelids out of the photographic field of view, narrow viewing angle, etc.

Active Publication Date: 2021-02-23
TIANJIN OFILM OPTO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]In the driver monitoring system, the captured images are analyzed by software, especially from the movement of the driver's eyelids and eyeballs to detect whether the driver is drowsy or paying attention Not concentrated, and the angle of view of the existing optical system is narrow, when the driver's seating position deviates, etc., the eyelids or pupils may be out of the photographic field of view

Method used

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  • Optical system, camera module and terminal equipment
  • Optical system, camera module and terminal equipment
  • Optical system, camera module and terminal equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Such as figure 1 As shown, the straight line 11 represents the optical axis, the side of the first lens L1 away from the second lens L2 is the object side 12 , and the side of the fifth lens L5 away from the fourth lens L3 is the image side 13 . In the optical system provided by this embodiment, from the object side 12 to the image side 13, the first lens L1, the second lens L2, the diaphragm STO, the third lens L3, the fourth lens L4, the fifth lens L5, the filter Light sheet LF, protective glass CG.

[0057] The first lens L1 has a negative refractive power and is made of glass. Its object side S1 is convex at the near optical axis and at the circumference, and its image side S2 is concave at the near optical axis and at the circumference, and both are spherical. .

[0058] The second lens L2 has positive refractive power and is made of plastic material. Its object side S3 is concave at the near optical axis and at the circumference, and its image side S4 is convex ...

Embodiment 2

[0080] Such as image 3 As shown, the straight line 11 represents the optical axis, the side of the first lens L1 away from the second lens L2 is the object side 12 , and the side of the fifth lens L5 away from the fourth lens L3 is the image side 13 . In the optical system provided by this embodiment, from the object side 12 to the image side 13, the first lens L1, the second lens L2, the diaphragm STO, the third lens L3, the fourth lens L4, the fifth lens L5, the filter Light sheet LF, protective glass CG.

[0081] The first lens L1 has a negative refractive power and is made of glass. Its object side S1 is convex at the near optical axis and at the circumference, and its image side S2 is concave at the near optical axis and at the circumference, and both are spherical. .

[0082] The second lens L2 has positive refractive power and is made of plastic material. Its object side S3 is concave at the near optical axis and at the circumference, and its image side S4 is convex ...

Embodiment 3

[0100] Such as Figure 5 As shown, the straight line 11 represents the optical axis, the side of the first lens L1 away from the second lens L2 is the object side 12 , and the side of the fifth lens L5 away from the fourth lens L3 is the image side 13 . In the optical system provided by this embodiment, from the object side 12 to the image side 13, the first lens L1, the second lens L2, the diaphragm STO, the third lens L3, the fourth lens L4, the fifth lens L5, the filter Light sheet LF, protective glass CG.

[0101]The first lens L1 has a negative refractive power and is made of glass. Its object side S1 is convex at the near optical axis and at the circumference, and its image side S2 is concave at the near optical axis and at the circumference, and both are spherical. .

[0102] The second lens L2 has positive refractive power and is made of plastic material. Its object side S3 is concave at the near optical axis and at the circumference, and its image side S4 is convex ...

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Abstract

The embodiment of the invention discloses an optical system, a camera module and terminal equipment. The optical system includes a first lens element with negative refractive power; a second lens element with positive refractive power having a concave object-side surface at a paraxial region and a convex image-side surface at a paraxial region; a third lens element with positive refractive power,wherein both the object-side surface and the image-side surface of the third lens element are convex in a paraxial region; a fourth lens element with negative refractive power, wherein the image-sidesurface of the fourth lens element is concave in a paraxial region; a fifth lens element with positive refractive power, wherein the image-side surface of the fifth lens element is convex in a paraxial region; the optical system satisfies 1<(D23+CT3) / (CT4+D45)<3. The optical system has the characteristics of miniaturization and large field angle and has good imaging quality in a near-infrared region by configuring the refractive power and the surface type of the first to fifth lenses and limiting 1 <(D23+CT3) / (CT4+D45)<3.

Description

technical field [0001] The present application belongs to the technical field of optical imaging, and in particular relates to an optical system, a camera module and a terminal device. Background technique [0002] In recent years, as more and more people pay attention to the safety of vehicle driving, a driver monitoring system with a monitoring system that can capture the driver's working state and issue a warning when the driver's driving state is abnormal has emerged as the times require. [0003] In the driver monitoring system, the software analyzes the captured images, especially from the movement of the driver's eyelids and eyeballs to detect whether the driver is drowsy or inattentive. However, the existing optical system has a narrow viewing angle. When the driver's seating position deviates, etc., the eyelids or pupils may be out of the photographic field of view. In addition, the optical system needs to be able to be used in dark environments such as daytime, ni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/06G02B13/18
Inventor 乐宇明蔡雄宇董勇兵赵迪
Owner TIANJIN OFILM OPTO ELECTRONICS CO LTD
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