Laser light source structure and projection optical system

Abstract

The invention provides a laser light source structure and a projection optical system. The laser light source structure comprises an excitation light source, a first light splitting and combining element, a first wavelength conversion device, a second wavelength conversion device and an optical machine which are arranged in a light path; the excitation light source is used for emitting excitationlight; one part of the exciting light is guided to the first wavelength conversion device by the first light splitting and combining element to generate first excited light; the other part of the exciting light is guided to the second wavelength conversion device by the first light splitting and combining element to generate second excited light; and the first excited light and the second excitedlight are combined under the guidance of the first light splitting and combining element and then emitted to the optical machine. According to the laser light source structure, the exciting light is divided into two parts, the two parts of exciting light are converted into the excited light with the wavelength larger than the wavelength of the short-wave blue light, then light combination is conducted, and the short-wave blue light in the light source is removed.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a laser light source structure and a projection optical system. Background technique [0002] Laser light source has the advantages of high brightness, good color, low energy consumption, long life and small size, and has been widely used in the optical field; with the rapid development of the laser projection industry, people's requirements for the brightness and color of laser projectors are gradually increasing At the same time, it also began to pay attention to the impact of the use of laser projection on human health. [0003] At present, the optical path of the light source of LCD laser light source products on the market usually forms white light by coupling the blue light emitted by the blue laser with the wavelength-converted laser light, and then makes the white light incident into the optical machine system; the laser light source structure of this structure, Compare...

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Problems solved by technology

[0003] At present, the optical path of the light source of LCD laser light source products on the market usually forms white light by coupling the blue light emitted by the blue laser with the wavelength-converted laser light, and then makes the white light incident into the optical machine system; the laser light source structure of this structure, Compared with the DLP projection system, it reduces the damage of blue light to human eyes; however, because there are still short-wave blue light components in the blue light used for display, it is still easy to cause damage to the user's eyes during use

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