JPS6265012A - Light emitting element - Google Patents

Abstract

PURPOSE:To irradiate a high output laser beam to one point by making a light emitting element of each light source of a light source array coincide with the focal position of each collimating lens of a collimating lens array. CONSTITUTION:From each semiconductor laser 2... of a semiconductor laser array 1, divergent laser beams L... are emitted, and led to a collimating lens array 3. This array 3 is constituted by arranging plural pieces of collimating lenses 4... such as spherical lenses, etc., and a light emitting point of each semiconductor laser 2... of the semiconductor laser array 1 is made to coincide with a focal position of said each lens 4.... Accordingly, the divergent laser beams L... which are led to this collimating lens array 3 are converted to a parallel luminous flux whose section is elliptical by passing through the collimating lens array 3, and thereafter, led to a refracting prism 5 being a beam shape converting means, and converted to a parallel luminous flux whose sectional shape is corrected, by passing through this refracting prism 5. In such a way, even if plural light emitting points exist, the laser beams L... can be condensed to one point by one piece of lens 6.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to optical discs, compact discs,
The present invention relates to light emitting elements applied to video discs, laser printers, etc.

[Technical background of the invention and its problems]

Recently, in the process of developing high-power semiconductor lasers, semiconductor laser arrays consisting of a plurality of semiconductor lasers have been developed.

However, since this semiconductor laser array has a plurality of light emitting points, it has a drawback that when the emitted laser light is focused by one lens, the laser light is not focused at one point.

[Purpose of the invention]

The present invention was made based on the above circumstances, and its purpose is to make it possible to irradiate a high-power laser beam onto a single point by focusing the emitted light onto a single point using a single lens. An object of the present invention is to provide a light-emitting device.

[Summary of the invention]

In order to achieve the above object, the present invention provides a light source array formed by arranging a plurality of light sources, and a collimating lens array formed by arranging a plurality of collimating lenses so as to correspond to each light source of the light source array. This light emitting element is characterized in that the light emitting point of each light source of the light source array is made to coincide with the focal position of each collimating lens of this collimating lens array.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a phase-locked semiconductor laser array (light source array), and this semiconductor laser array 1 has a configuration in which a plurality of semiconductor lasers (light sources) 2 are arranged. Divergent laser beams L are emitted from each of the semiconductor lasers 2 in the semiconductor laser array 1 and guided to the collimating lens array 3.

This collimating lens array 3 has a structure in which a plurality of collimating lenses 4 such as spherical lenses are arranged in correspondence with each semiconductor laser 2 of the semiconductor laser array 1, and each collimating lens 4
The light emitting points of the semiconductor lasers 2 of the semiconductor laser array 1 are aligned with the focal positions of the semiconductor laser array 1. Therefore, the diverging laser beam L... guided to the collimator lens array 3 is converted into a parallel light beam having an elliptical cross section by passing through the collimator lens array 3. Thereafter, the beam is guided to a refraction prism 5 as a beam shape converting means, and by passing through the refraction prism 5, it is converted into a parallel light beam whose cross-sectional shape has been corrected.

According to the above configuration, even if there are a plurality of light emitting points, the laser beams L... can be focused on one point with one lens 6. Therefore, the high-output laser beam L... can be focused on one point.

Note that the collimating lens array 3 is not limited to the above-mentioned embodiment, and may be a selfoc lens array formed by arranging a large number of self-center lenses (trade name) as collimating lenses, or a selfoc lens array formed by arranging a large number of self-center lenses (trade name) as collimating lenses. A lens array may be used in which a plurality of collimating lenses are created by locally diffusing heavy ions.

【Effect of the invention〕

As explained above, according to the present invention, there is provided a light source array formed by arranging a plurality of light sources, and a collimating lens array formed by arranging a plurality of balance mate lenses so as to correspond to each light source of the light source array. Since the light emitting point of each light source of the light source array is aligned with the focal position of each collimating lens of this collimating lens array, the emitted light can be focused on one point with one lens.
It has excellent effects such as being able to irradiate a single point with extremely high-power laser light.

[Brief explanation of drawings]

The drawing is a configuration diagram showing an embodiment of the present invention. 1... Light source array (semiconductor laser array), 2...
- Light source (semiconductor laser), 3... collimating lens array, 4... collimating lens.

Claims (1)

[Claims] It comprises a light source array formed by arranging a plurality of light sources, and a collimating lens array formed by arranging a plurality of collimating lenses so as to correspond to each light source of this light source array, and each collimating lens of this collimating lens array. A light emitting element, characterized in that a light emitting point of each light source of the light source array is aligned with a focal position of the light source array.