Laser beam expanding lens system

Abstract

The invention provides a laser beam expanding lens system, comprising a first lens and a second lens, wherein the first lens, as a meniscus lens, includes a curved face bending in opposition to the incident direction of light, the second lens, as a planoconvex lens, includes a curved face bending towards the incident direction of light, the two lenses are positioned on the same optic axis; the spacing between the first lens and the second lens on the optic axis is d2, which is equal to 300mm+ / -15%; compared with the prior art, the laser beam expanding lens system realizes the adjustment of a laser to emit light beams by arranging a meniscus lens and a planoconvex lens as well as by the spacing between the lenses, thus the light beam emitted by the laser can be expanded by 10 to 15 times; the laser beam expanding lens system can simultaneously adjust parallelism of the emitted laser, light beam with the diameter reaching [phi]10-100mm can be formed after the beam expanding, and the light beam is adjusted by the beam expanding lens to a parallel light pillar which can reach as far as 5 to 30 kilometres.

Description

technical field [0001] The invention relates to an optical lens, in particular to a laser beam expander system for urban lighting demonstration. Background technique [0002] With the expansion of laser applications, a city laser demonstration lighting system has been developed in recent years. It can be used as a city mark on weekdays, and it can emit colorful beams of various colors in and around the city center to increase the festive atmosphere during holidays. Since this kind of lamp post needs to be able to cover the entire city, the diameter of this kind of light post must have a certain size, and it is required to be able to shoot far. At present, the laser can only be made into a smaller diameter outgoing beam, such as: 1-5mm, and the divergence angle of the laser beam is generally large, the beam of light in the sky can only be limited to a very short distance before disappearing in the air, so , In modern optical systems, it is often necessary to expand parallel ...

AI Technical Summary

Problems solved by technology

For example, Chinese Patent No. ZL200410084636.5 provides a universal beam expansion system for beams, which separates the lens frame from the adjustment part, and realizes beam expansion by replacing the lens. This beam expansion system is quite troublesome to use and cannot be used at will. Adjust the size and direction of the emitted beam of light

In modern cities, colorful lights can be seen everywhere, which are emitted by laser light demonstration systems, but the current industrial lasers cannot be used for light demonstrations, because their beams are too thin and cannot be far away due to the divergence angle. can not meet the needs of modern urban lighting demonstration

Images