SK501352014U1 - Optical laser system designed for electronic control of the divergence of the laser beam - Google Patents

Abstract

The optical system according to the invention has in the path of the laser beam placed at least one computer-controllable lens (2) with an electronically tunable optical power to control the divergence of the laser beam at incident surfaces. The system also contains at least one lens (1). The diameter of the laser beam in the area of incident surfaces at different distances from the laser according to the invention can be adapted to the particular distances by means of an optical system of each impact area for achieving equal the diameter of the laser beam at each impact area. The intensity of the laser beam can be also adjusted without loss of power so as not to threaten a person close to the projected beams. The optical system can be used to create the effect of actively controllable diameter of the laser beam during laser show, in advertisement or in laser welding.

Description

Optical system designed to electronically control the divergence of a laser beam generated by a laser device.

Technical field

The technical solution relates to an optical system for controlling the divergence of a laser beam by means of an electronically controllable lens.

Prior art

At present, electronic lenses are used primarily in applications aimed at maintaining an object or scene in the focus of the optical system in which the electronic lens is used while the object or optical system is moving.

Active instantaneous adjustment of the divergence of the laser beams in the laser show is practically non-existent. The divergence, and thus also the diameter of the laser beams, has so far been constant during the laser show. During a laser show, safety is ensured only by mechanical obstacles and by adjusting the performance of the lasers.

The essence of the technical solution

These disadvantages are eliminated by the optical system according to the technical solution, the essence of which consists in the fact that at least one electronic lens with a tunable optical power φ in the range from -100 to 100 dpt is placed in the path of the laser beam, where dpt = m · 'represents a unit of diopters. The optical power of electronic lenses is controllable by a computer. When the optical power of the electronic lens changes, the divergence of the beam changes, which leads to a change in the diameter of the beam on the given impact surface.

The optical system may comprise, in addition to the electronic lens with tunable optical power, at least one standard lens with an optical power in the range of -16 to 3 dpt.

The optical system according to the technical solution can be used to create the effect of actively controllable divergence of the laser beam in laser show, advertising, during laser welding. This is a new unique effect for drawing patterns with a variable line width during a laser show, with the possibility of adapting the divergence of the laser beam to the given space with regard to the distance of its impact surfaces from the laser.

The optical system can be used to actively increase safety in a laser show while maintaining light output by increasing the diameter of laser beams projected close to people.

The lower the intensity of the laser beams that are projected close to people, the safer they are. At a given laser power, the beam intensity on a given impact surface decreases with increasing beam diameter. By adjusting the diameter of the laser beam by means of an electronic lens with adjustable optical power, it is thus possible to adapt the laser effects which are projected close to persons so as to increase the safety of persons without reducing the power of the laser.

Overview of figures in the drawings

In FIG. 1 and 2 show an optical system comprising successively a conventional lens 1, a lens 2 with an electronically controllable optical power and a conventional lens 3.

In FIG. 1 shows the state when the input divergence of the passing beam θ = 0 ° is maintained at the output of the optical system.

In FIG. 2 shows the state when the optical system changes the beam divergence from θ = 0 ° at the input to Θ = 8.4 ^Ο at the output.

In FIG. 3 and 4 show an optical system comprising successively two lenses 4 with an electronically controllable optical power (designated 4a, 4b).

In FIG. 3 shows the state when the input divergence of the passing beam θ = 0 ° is maintained at the output of the optical system.

In FIG. 4 shows a state where the optical system changes the beam divergence from θ = 0 ° at the input to θ = 12.18 ° at the output.

In FIG. 5 and 6 show an optical system comprising one lens 5 with an electronically controllable optical power.

In FIG. 5 shows a state where the optical system changes the beam divergence from θ = 0 ° at the input to θ = 5.73 ° at the output.

In FIG. 6 shows a state where the optical system changes a parallel beam at the input to a converging 0 = 0.57 ° at the output.

Examples of embodiments

The present technical solution is further described and explained in more detail by means of exemplary embodiments. In all examples, a laser beam with a diameter of 10 mm was used at the entrance to the optical system.

Example I

The optical system shown in FIG. 1 comprises a conventional lens 1 with an optical power φ = 2 dpt, a lens 2 with an electronically controllable optical power in the range φ from -1 to -5 dpt and a conventional lens 3 with an optical power ¢ 7 = -14.28 dpt. The distance between lenses 1 and 2 is 200 mm and the distance between lenses 2 and 3 is 358.6 mm. The thin solid line shows the passage of light rays through the optical system in a state where the lens 2 has an optical power φ = - \ dpt. In this state, the input divergence of the passing beam θ = 0 ° is maintained at the output of the optical system.

Example 2

The optical system shown in FIG. 2 contains a conventional lens 1 with an optical power φ = 2 dpt, a lens with an electronically controllable optical power 2 in the range φ from -1 to -5 dpt and a conventional lens 3 with an optical power ¢) = - 14.28 dpi. The distance between lenses 1 and 2 is 200 mm and the distance between lenses 2 and 3 is 358.6 mm. The thin solid line shows the passage of light rays through the optical system in a state where the lens 2 has an optical power ¢) = - 5 dpt. In this state, the optical system changes the beam divergence from 0 = 0 ° at the input to Θ = 8.4 ^Ο at the output.

Example 3

The optical system shown in FIG. 3 comprises two lenses 4a, 4b with electronically controllable optical power in the range φ from 20 to 100 dpt. The distance between the lenses 4a, 4b is 20 mm. The thin solid line shows the passage of light rays through the optical system in a state where the lenses have an optical power ¢) = 100 dpt. In this state, the input divergence of the passing beam θ = 0 ° is maintained at the output of the optical system.

Example 4

The optical system shown in FIG. 4 comprises two lenses 4a, 4b with electronically controllable optical power in the range φ from 20 to 100 dpt. The distance between the lenses 4a, 4b is 20 mm. The thin solid line shows the passage of light rays through the optical system in a state where the lenses have an optical power ¢) = 20 dpt. In this state, the optical system changes the diverging beam at the input to converging Θ = 18.18 ° at the output.

Example 5

The optical system shown in FIG. 5 contains one lens 5 with electronically controllable optical power in the range φ from -100 to I dpt. The thin solid line shows the passage of light rays through the optical system in a state where the lens has an optical power ¢ 9 = -100 dpt. In this state, the optical system changes the beam divergence from θ = 0 ° at the input to θ = 53.13 ° at the output.

Example 6 ’

The optical system shown in FIG. 5 contains one lens 5 with an electronically controllable optical power in the range φ from -100 to Idpt. The thin solid line shows the passage of light rays through the optical system in a state where the lens has an optical power ¢) = 1 dpt. In this state, the optical system changes the parallel beam at the input to a converging beam θ = 0.57 ° at the output.

Industrial applicability

The laser optical system intended for electronic control of the laser beam divergence according to the technical solution can be used to adjust the laser beam divergence in the laser show, to adjust the diameter of the laser beam to the distance of the impact surfaces from the laser and to adapt the laser beam to people. The main use is found in advertising, laser show, but also in laser welding.

Claims (2)

CLAIMS FOR PROTECTION An optical system for electronically controlling the divergence of a laser beam generated by a laser device, characterized in that at least one computer-operable lens (2) with an electronically tunable optical power in the range (p from -100 to 100 dpt) is located in the path of the laser beam. Optical system according to claim 1, characterized in that it comprises at least one lens (1) with an optical power in the range φ from -16 to 3 dpt.