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Optical scanning lens and scanning equipment

An optical scanning and lens technology, applied in the field of optical lenses, can solve the problem of difficulty in taking into account the volume and scanning effect, and achieve the effect of high imaging quality, stable imaging quality, and ensuring scanning effect.

Active Publication Date: 2021-07-16
GUANGDONG XUYE OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides an optical scanning lens and a scanning device to solve the problem that the volume and scanning effect of the scanning device in the prior art are difficult to balance

Method used

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  • Optical scanning lens and scanning equipment
  • Optical scanning lens and scanning equipment
  • Optical scanning lens and scanning equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] see Figure 1 to Figure 3 , figure 1 It shows a schematic diagram of an optical scanning lens according to Embodiment 1 of the present invention, figure 2 From left to right are the astigmatism and distortion curves of an optical scanning lens according to Embodiment 1 of the present invention, image 3 It is a spherical aberration curve diagram of an optical scanning lens according to Embodiment 1 of the present invention.

[0089] The present invention provides an optical scanning lens, which sequentially includes a first lens 110, a diaphragm 101, a second lens 120, a third lens 130, and a fourth lens 140 along the optical axis from the object side to the image side. Each of the four lenses 140 has an object-side surface facing the object side and an image-side surface facing the image side; the optical scanning lens also includes an imaging surface on the image side for imaging the subject.

[0090] In the optical scanning lens, the aperture is located between t...

Embodiment 2

[0104] see Figure 4 to Figure 6 , Figure 4 It shows a schematic diagram of an optical scanning lens according to Embodiment 2 of the present invention, Figure 5 From left to right are the astigmatism and distortion curves of an optical scanning lens according to Embodiment 2 of the present invention, Image 6 It is a spherical aberration curve diagram of an optical scanning lens according to Embodiment 2 of the present invention.

[0105] The present invention provides an optical scanning lens, which sequentially includes a first lens 210, a diaphragm 201, a second lens 220, a third lens 230, and a fourth lens 240 along the optical axis from the object side to the image side. Each of the four lenses 240 has an object-side surface facing the object side and an image-side surface facing the image side; the optical scanning lens also includes an imaging surface on the image side for imaging the subject.

[0106] In the optical scanning lens, the aperture 201 is located betw...

Embodiment 3

[0119] see Figure 7 to Figure 9 , Figure 7 shows a schematic diagram of an optical scanning lens according to Embodiment 3 of the present invention, Figure 8 From left to right are the astigmatism and distortion curves of an optical scanning lens according to Embodiment 3 of the present invention, Figure 9 It is a spherical aberration curve diagram of an optical scanning lens according to Embodiment 3 of the present invention.

[0120] The present invention provides an optical scanning lens, which sequentially includes a first lens 310, a diaphragm 301, a second lens 320, a third lens 330, and a fourth lens 340 along the optical axis from the object side to the image side. Each of the four lenses 340 has an object-side surface facing the object side and an image-side surface facing the image side; the optical scanning lens also includes an imaging surface on the image side for imaging the subject.

[0121] In the optical scanning lens, the aperture 301 is located betwee...

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Abstract

The invention discloses an optical scanning lens and scanning equipment, and the optical scanning lens sequentially comprises, from an object side to an image side along an optical axis, afirst lens element with positive refractive power and having an object-side surface being convex in a paraxial region; a second lens element with positive refractive power and having an object-side surface being concave in a paraxial region and an image-side surface being convex in a paraxial region; a third lens element with negative refractive power and having an object-side surface being concave in a paraxial region and an image-side surface being convex in a paraxial region; and a fourth lens. The refractive indexes of the first lens, the second lens and the fourth lens are less than 1.6, and f / f1 is more than 0.0 and less than 2.0, wherein f is the focal length of the optical scanning lens, and f1 is the focal length of the first lens. The four-piece type lens is adopted, the surface shape structure of each lens is combined with the optimal range of optical parameters, stable high imaging quality is achieved, meanwhile, the overall size of the lens can be effectively reduced, the light inlet amount can be effectively guaranteed, and therefore the scanning effect is guaranteed under the conditions that the size of scanning equipment is small and the size of an aperture is limited.

Description

technical field [0001] The invention relates to the technical field of optical lenses, in particular to an optical scanning lens and scanning equipment. Background technique [0002] Nowadays, all kinds of supermarkets, stores and other places need to use code scanning equipment to scan codes when checking out, such as scanning products with barcode scanning equipment, scanning customers' payment QR codes with QR code scanning equipment during checkout, etc. [0003] Since a hand-held scanning device is required to scan the code, if the scanning device is too large, it will increase the difficulty of use because it is too bulky, and it will also increase the work intensity of the user. Therefore, the volume of the scanning device tends to be miniaturized, but due to the aperture The size of the scanning device will be limited by the volume of the scanning device. In the case of a small scanning device, the size limitation of the aperture will lead to a low amount of incoming...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G02B26/10
CPCG02B13/004G02B13/18G02B26/10
Inventor 林肖怡杨剑锋张龙刘涵
Owner GUANGDONG XUYE OPTOELECTRONICS TECH
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