Light wave guide device,light source device and light information processor

Abstract

To provide an optical waveguide device which is small in light loss , can be made small in size and low in cost, is small in the polarization dependency of transmittance and reflectance by a filter, and multiplexes or demultiplexes a plurality of light beams having different wavelength by segmenting the wavelength of transmitted light and the wavelength of reflected light in a narrower range, and to provide a light source device suitable as a point light source device for a compact display or the like and an optical information processing device which use the optical waveguide device. An optical waveguide layer 2 composed of an assembly of a clad 3 having the shape of a pentagon ABCDE where a side DE and a side BA cross at an acute angle of 45 degrees, and cores 4 to 6 is formed in the optical waveguide device. The core 4 is linearly provided from the side AB to a side CD nearly perpendicularly to the side AB, and the cores 5 and 6 are linearly provided from the side DE to a crossing part 7 or 9 crossing with the core 4 nearly perpendicularly to the side DE. Wavelength selecting filters 8 and 10 are provided at the crossing parts so as to part the core 4. In multiplexing the light, light is made incident from light incident or emitting end faces 11 to 13, and multiplexed light is taken out from a light emitting or incident end face 14.

Description

technical field [0001] The present invention relates to an optical waveguide device for multiplexing or splitting multiple beams of light having different wavelengths, a light source device using the same, suitable for use as a point light source device such as a small display, and an optical information processing device. Background technique [0002] In recent years, miniaturization, weight reduction, and multifunctionalization of electronic equipment, especially portable electronic equipment, etc. are being demanded. In this trend, image data is also being processed on portable electronic devices, and how to realize the function of displaying fine images easily has become a subject of research. [0003] For example, the retinal display disclosed in Japanese Patent Application Publication No. 11-505627, etc., can reduce the area occupied by the screen display because the image is formed on the retina of the user's eye, and can achieve both miniaturization and high-precisio...

AI Technical Summary

Problems solved by technology

In the case of light with unrestricted polarization such as LEDs, when it is desired to transmit light of one wavelength within a narrow wavelength range and reflect light of other wavelengths, if the incident light is placed at an angle as large as 45 degrees It is well known that the reflectance and transmittance of the filter are highly dependent on polarization and the loss becomes large when the incident light is incident on the filter.

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