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

Abstract

The invention relates to a lens assembly. The lens assembly comprises at least three light distribution modules and one transparent panel; the transparent panel comprises two opposite panel surfaces and is provided with one light transmitting hole penetrating the two panel surfaces; the light transmitting holes are used for aligning to a lens of the camera; the at least three light distribution modules are arranged around the light transmitting hole; each light distribution module is a convex lens; each light distribution module comprises an inward concave curved surface and an outward convex curved surface which are oppositely arranged, wherein each inward concave curved surface is an incident surface; each inward concave curved surface is a hemispherical surface of which the circle center is located on the optical axis of each light distribution module; each inward concave curved surface is fixed on one panel surface; the outward convex curved surface takes the optical axis of each light distribution module as a central shaft; each outer convex curved surface is used for refracting light emitted by each inward concave surface in a mode of multiple equal-width circular ring ranges, and the circular ring ranges are the same in illuminance. By the adoption of 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 the 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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