Lens assembly, light supplementing assembly and camera with light supplementing assembly

Abstract

The invention relates to a lens assembly. The lens assembly comprises at least two light distribution modules and one transparent panel; the transparent panel is provided with one light transmitting hole penetrating through two panel surfaces; the periphery of each light distribution module is a rotary free-form surface; the big end of each light distribution module is connected with one panel surface and the small end of each light distribution module is provided with a light source accommodating cavity; each light source accommodating cavity comprises a bottom and side walls; the included angle between the generatrix of each side wall and the optical axis of the corresponding light distribution module is 12-14 degrees; each bottom is used for refracting light within + / -40 degrees, emitted by a light source, to the end surface of the big end of each light distribution module, and refracting through the end surface of the big end of each light distribution module to form light within + / -15 degrees; the side walls are used for refracting light being larger than + / -40 degrees and smaller than or equal to + / -90 degrees to the periphery, then totally reflecting to the end surface of each big end from the periphery and refracting through the end surface of the big end of each light distribution module to form light within + / - 8 degrees to + / - 22 degrees, which is then overlapped with the light within + / -15 degrees, refracted by the end surface of the big end of each light distribution module, to form a light beam with a semi light intensity angle being 40 degrees. According to the lens assembly, the light source uniformity is better, and the light flux utilization rate is higher. In addition, the invention also provides a light supplementing assembly with the lens assembly, and a camera.

Description

technical field [0001] The invention relates to the field of imaging, in particular to a lens assembly, a supplementary light assembly and a camera with the supplementary light assembly. Background technique [0002] At present, the use of lenses to record information has been widely used in people's daily life. With the increasing popularity of surveillance systems in commercial and civilian use, surveillance cameras (surveillance cameras) are widely used in various fields to protect social security. [0003] Surveillance cameras are widely used in residential buildings, roads, shopping malls and financial offices. Each different application field requires different types of surveillance cameras. In order to meet the needs of night monitoring and monitoring in some special places, day and night surveillance cameras have emerged as the times require and are showing rapid development. [0004] Day and night camera monitors are equipped with LEDs next to the lens for supplem...

AI Technical Summary

Problems solved by technology

[0004] Day and night camera monitors are equipped with LEDs next to the lens for supplementary light, but there are two main methods of supplementary light on the market: 1. Directly arrange LEDs next to the lens for supplementary light; 2. Use LEDs and reflectors for supplementary light However, the illuminance and uniformity of the above two methods are generally not ideal

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