Optical integration unit provided with hologram element and optical pickup device
A technology of integrated units and holographic elements, which is applied in the direction of integrated optical head devices, laser devices, beam guiding devices, etc., can solve the problems of difficult miniaturization of optical pickup devices, hinder high-speed replay or high-speed recording, and insufficient light volume, etc. Can achieve miniaturization, high laser utilization efficiency, and the effect of improving utilization efficiency
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Embodiment approach 1
[0056] Below, refer to Figure 1 to Figure 3 The optical integrated unit and optical pickup device according to Embodiment 1 of the present invention will be described. Also, the technical terms used in the description of the present invention to indicate directions, such as upper surface and upper side, do not indicate absolute directions, but indicate the relative positional relationship of various parts.
[0057] figure 1 It is a schematic cross-sectional view of the first optical integrated unit and the first optical pickup device of the present embodiment. The optical integration unit 40 has a light emitting unit 1 for oscillating and emitting two laser beams. The light emitting unit 1 includes a light source 1a and a light source 1b. Light sources 1a, 1b form energy to figure 1 The upper oscillation emits laser light. The light source 1a and the light source 1b are formed so that the optical axes of the oscillating and emitted laser light are substantially in the ...
Embodiment approach 2
[0106] refer to Figure 4 and Figure 5 , an optical integrated unit and an optical pickup device according to Embodiment 2 of the invention of the present application will be described.
[0107] The optical integrated unit and optical pickup device of this embodiment are the same as the optical integrated unit and optical pickup device of Embodiment 1 in that they include a polarized hologram element, a non-polarized hologram element, and a phase difference plate. The light emitting unit is also the same as the optical integrated unit and the optical pickup device of the first embodiment in that two light sources are provided to oscillate and emit two laser beams. In this embodiment, a member for dividing the light emitted by oscillation is provided.
[0108] Figure 4 It is a schematic cross-sectional view of the first optical integrated unit and the first optical pickup device of the present embodiment. The polarizing hologram element 14 is formed on the upper surface o...
Embodiment approach 3
[0123] refer to Figure 6 to Figure 10 , an optical integrated unit and an optical pickup device according to Embodiment 3 of the present invention will be described. In this embodiment mode, specific device forms of the optical integrated unit and the optical pickup device described in Embodiment Mode 1 and Embodiment Mode 2 will be described.
[0124] Image 6 It is a schematic cross-sectional view of the first optical integrated unit and the first optical pickup device of the present embodiment. The first optical integration unit and the first optical pickup device are the third optical integration unit and the third optical pickup device of the first embodiment (refer to image 3 ) is installed on the fixing member.
[0125] The light emitting unit 1, the light receiving unit 4c, the polarized hologram element 12, and the non-polarized hologram element 13 are integrally formed on the first optical integration unit 42 by using the holder 9. A base 39 for fixing the ligh...
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Abstract
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