CN2291492Y - 方视广角门镜 - Google Patents

方视广角门镜 Download PDF

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Publication number
CN2291492Y
CN2291492Y CN 97238070 CN97238070U CN2291492Y CN 2291492 Y CN2291492 Y CN 2291492Y CN 97238070 CN97238070 CN 97238070 CN 97238070 U CN97238070 U CN 97238070U CN 2291492 Y CN2291492 Y CN 2291492Y
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face
lens
negative lens
cylinder negative
wide
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CN 97238070
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黄超红
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Abstract

本实用新型公开了一种方视广角门镜,为了克服目前门镜上使用的广角镜头所成的桶形畸变像,成像从中心向外鼓起,变形较大,甚至产生怪异现象。本实用新型的镜头上采用一组四块重叠排列并且相互轴向垂直的圆柱面负透镜,所成的像呈方形畸变,因此成像变形不大,视觉效果得以改善,看到的像使人感到舒服。

Description

方视广角门镜
本实用新型涉及一种光学镜头。
目前在家庭居所里,为了防止不速之客,在居所的大门上,一般安置一种门镜,为了得到较大的视野,这种门采用的是一般的广角镜头,由于这种广角镜头所成的像成桶形畸变,从门镜中所观察到的人脸像从中心向外鼓起,变形较大,甚至产生怪异、不舒服的感觉,影响对来访者的判断。
本实用新型的目的是提供一种改善视觉效果的广角门镜。
本实用新型是这样实现的:一种方视广角门镜,包括外壳6、透镜套筒7,固定套筒9,固定套筒9与透镜套筒7螺纹结合,在透镜套筒7的内侧端镶有一球面正透镜5,在透镜套筒7的外侧端用外壳6固定一组四块重叠排列并互相轴向垂直的圆柱面负透镜组,圆柱面负透镜组与球面透镜5之间有一内套筒8,固定套筒9的外侧端的筒壁上开有两个对称的槽10;圆柱面负透镜2、4的综合光焦度与圆柱面负透镜组1、3的综合光焦都等于圆柱面负透镜2、3同向时的综合光焦度;圆柱面负透镜2的光焦度与圆柱面负透镜3的光焦度相等;
本实用新型由于采用一组由四块重叠排列并且相互轴向垂直的圆柱面负透镜组,所成的像呈方形畸变,成像变形不很大,减少了视觉上的怪异现象,视觉效果得到改善,看到的像使人感觉舒服。
下面结合附图对本实用新型作进一步说明:
图1为本实用新型纵向剖面视图
图2为本实用新型的A-A剖面视图
如图1、图2所示,一种方视广角门镜包括外壳6,透镜套筒7,固定套筒9,固定套筒9与透镜套筒7螺纹结合,在透镜套筒7的内侧端镶有一球面正透镜5,在透镜套筒7的外侧端用外壳6固定一组四块重叠排列并互相轴向垂直的圆柱面负透镜组,圆柱面负透镜2、3的光焦度相同,圆柱面负透镜1、3的综合光焦度与圆柱面负透镜2、4的综合光焦都同等于圆柱面负透镜2、3的综合光焦度,在球面正透镜5与圆柱面负透镜组之间有一内套筒8,在固定套筒9的外侧端的筒壁上开有两个对称的槽10。

Claims (2)

1.一种方视广角门镜,包括外壳[6]、透镜套筒[7],固定套筒[9],固定套筒[9]与透镜套筒[7]螺纹结合,其特征在于:在透镜套筒[7]的内侧端镶有一球面正透镜[5],在透镜套筒[7]的外侧端用外壳[6]固定一组四块重叠排列并互相轴向垂直的圆柱面负透镜组,圆柱面负透镜组与球面透镜[5]之间有一内套筒[8],固定套筒[9]的外侧端的筒壁上开有两个对称的槽[10]。
2.根据权利要求1所述的方视广角门镜,其特征在于:圆柱面负透镜[2],[4]的综合光焦度与圆柱面负透镜组[1]、[3]的综合光焦度都等于圆柱面负透镜[2]、[3]同向时的综合光焦度,圆柱面负透镜[2]的光焦度与圆柱面负透镜[3]的光焦度相等。
CN 97238070 1997-04-25 1997-04-25 方视广角门镜 Expired - Fee Related CN2291492Y (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 97238070 CN2291492Y (zh) 1997-04-25 1997-04-25 方视广角门镜

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Application Number Priority Date Filing Date Title
CN 97238070 CN2291492Y (zh) 1997-04-25 1997-04-25 方视广角门镜

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CN2291492Y true CN2291492Y (zh) 1998-09-16

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CN 97238070 Expired - Fee Related CN2291492Y (zh) 1997-04-25 1997-04-25 方视广角门镜

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104499913A (zh) * 2015-01-15 2015-04-08 温州维沙华电气有限公司 防盗猫眼

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104499913A (zh) * 2015-01-15 2015-04-08 温州维沙华电气有限公司 防盗猫眼

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