Intelligent door viewer of large field of view
In order to solve the problem that a general door viewer has a narrow field of view and is inconvenient for people with low height and inconvenient movement, the invention provides a novel door viewer, including: a transmission Fresnel lens used for focusing light, a first reflective Fresnel lens lo...
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| Main Author | |
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| Format | Patent |
| Language | Chinese English |
| Published |
21.09.2018
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| Subjects | |
| Online Access | Get full text |
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| Summary: | In order to solve the problem that a general door viewer has a narrow field of view and is inconvenient for people with low height and inconvenient movement, the invention provides a novel door viewer, including: a transmission Fresnel lens used for focusing light, a first reflective Fresnel lens located on the left side of the transmission Fresnel lens, a second reflective Fresnel lens located onthe lower right side of the first reflective Fresnel lens and configured to reflect the light reflected by the first reflective Fresnel lens in parallel rays to the left side, a miniature camera located on the left side of the second reflective Fresnel lens and used for receiving the exiting light from the second reflective Fresnel lens, and a display screen connected to the left side of the miniature camera, wherein the video output end of the miniature camera is connected to the video input end of the display screen, and the light-incident side of the transmission Fresnel lens is a smooth surface.
为了解决般的猫眼视野范围窄以及对于 |
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| Bibliography: | Application Number: CN20181738520 |