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Low-cost dual-band optical zoom lens

An optical zoom and dual-band technology, applied in optics, optical components, instruments, etc., can solve the problem of high production cost

Inactive Publication Date: 2014-05-07
FUZHOU DEV ZONE HONGFA OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, related products with high-definition imaging of more than one million pixels on the market usually use eight to nine optical lenses. For example, the Chinese invention patent No. 200910112238.2 is called "Dual-band Optical Zoom Lens", and the focal length range is 2.8-10mm. , to achieve mega-pixel day and night high-definition imaging, but it uses nine lenses, and the production cost is relatively high

Method used

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  • Low-cost dual-band optical zoom lens
  • Low-cost dual-band optical zoom lens
  • Low-cost dual-band optical zoom lens

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0029] The optical data of the lens are as follows:

[0030] Side number R d n

[0031] 1 38.146 0.8 1.70

[0032] 2 7.682 4.88

[0033] 3 -20.682 0.7 1.63

[0034] 4 10.961 0.75

[0035] 5 13.316 2.57 1.85

[0036] 6 219.89 (d6)

[0037] Aperture S ∞ (ds)

[0038] 7 19.799 1.8 1.72

[0039] 8 -36.667 0.12

[0040] 9 8.232 3.8 1.67

[0041] 10 -8.11 2.58 1.85

[0042] 11 6.124 0.78

[0043] 12 11.901 2.25 1.72

[0044] 13 -11.901

[0045] Here, R represents the radius of curvature of the corresponding mirror surface, d represents the central thickness or air space of the corresponding lens, n represents the refractive index of the corresponding lens, d6 and ds are variable air space, the variation range of d6 is 14.15-0.69, and the change of ds The range is 7.37-0.83.

no. 2 example

[0047] The optical data of the lens are as follows:

[0048] Side number R d n

[0049] 1 53.305 0.8 1.72

[0050]2 7.426 5.15

[0051] 3 -20.927 0.7 1.62

[0052] 4 9.523 0.52

[0053] 5 10.825 2.97 1.85

[0054] 6 60.516 (d6)

[0055] Aperture S ∞ (ds)

[0056] 7 14.727 4.4 1.76

[0057] 8 -31.062 0.12

[0058] 9 9.219 2.38 1.60

[0059] 10 -9.219 4.4 1.85

[0060] 11 6.28 1.2

[0061] 12 10.522 2.33 1.71

[0062] 13 -12.145

[0063] Here, R represents the radius of curvature of the corresponding mirror surface, d represents the central thickness or air space of the corresponding lens, n represents the refractive index of the corresponding lens, d6 and ds are variable air space, the variation range of d6 is 11.16-0.8, and the change of ds The range is 8.33-0.25.

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Abstract

The invention discloses a low-cost dual-band optical zoom lens, which sequentially comprises a front lens group with negative focal power, a diaphragm and a rear lens group with positive focal power from an object side to an image side, wherein the front lens group comprises a convex-concave first lens with negative focal power, a double-concave second lens with negative focal power and a convex-concave third lens with positive focal power, the rear lens group comprises a double-convex fourth lens with positive focal power, a double-convex fifth lens with positive focal power, a double-concave sixth lens with negative focal power and a double-convex seventh lens with positive focal power, and the fifth lens and the sixth lens are glued assemblies. A variation of a 2.8-10mm focal range is realized through changing the air space between the front lens group and the rear lens group. The lens disclosed by the invention only uses seven lenses, materials of the lenses do not contain expensive lanthanide series glass and ultralow chromatic dispersion glass, has good processing properties, and effectively controls the cost. The lens is designed for a 1 / 2.7-inch sensor, the resolution achieves mega pixels within the overall focal range, and day and light confocal imaging is realized.

Description

technical field [0001] This patent belongs to the field of optomechanical integration and relates to an optical zoom lens, especially a low-cost dual-band confocal zoom lens. Background technique [0002] With the improvement of security awareness, the market demand for security monitoring lenses is getting higher and higher. In order to meet the clear monitoring of targets in the visible light environment during the day and the infrared light environment at night, it is necessary to use dual-band confocal of visible light and infrared light shot. The dual-band zoom lens with a focal length around 2.8-10mm is currently the most widely used product in the surveillance field, and is widely used in public places such as schools, factories, and supermarkets. At present, related products with high-definition imaging of more than one million pixels on the market usually use eight to nine optical lenses. For example, the Chinese invention patent No. 200910112238.2 is called "Dual-...

Claims

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Application Information

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IPC IPC(8): G02B15/177G02B1/00
Inventor 陈金发陈俊杰李宇航
Owner FUZHOU DEV ZONE HONGFA OPTOELECTRONICS TECH
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