Phase plate and device in a miniaturized dual-beam super-resolution optical storage optical system
A technology of optical path system and phase plate, which is applied in the field of miniaturized double-beam super-resolution optical storage optical path system, can solve the problems affecting the collimation of the optical path, the overlapping degree of two light spots, and the impact on resolution, etc.
Active Publication Date: 2020-05-19
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology
Due to changes in objective factors such as mechanical vibration and temperature, the collimation of the optical path and the degree of overlap of the two spots will be affected, thereby affecting the resolution
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[0031] The following describes several preferred embodiments of the present invention with reference to the accompanying drawings, so as to make the technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.
[0032] In the drawings, components with the same structure are denoted by the same numerals, and components with similar structures or functions are denoted by similar numerals. The size and thickness of each component shown in the drawings are shown arbitrarily, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of parts is appropriately exaggerated in some places in the drawings.
[0033] Such as figure 1 As shown, a phase plate involved in the present invention includes two transparent materials with differen...
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Abstract
The invention discloses a phase plate and equipment in miniaturized double-beam super-resolution optical storage optical path system, and relates to the field of miniaturized double-beam super-resolution optical storage optical path system. The phase plate and equipment in miniaturized double-beam super-resolution optical storage optical path system are characterized in that two transparent materials of different refractive indices are combined by a specific structure; when a writing-induced recording light and a writing-suppressed recording light simultaneously through the phase plate, the phase of the write-induced recording light does not change with spatial position in a plane perpendicular to the propagation direction, and the phase of the writing-suppressed recording light exhibits acorresponding distribution with the height of the phase plate at different positions; the phase plate acts on two different wavelengths; after the circularly polarized light is incident on the phaseplate and is focused by the objective lens, the writing-induced recording light can be focused into a solid spot, and the writing-suppressed recording light is focused into a hollow spot; it is realized that the writing- suppressed recording light is phase-modulated while maintaining the phase of the writing-induced recording light.
Description
technical field [0001] The invention relates to the field of miniaturized double-beam super-resolution optical storage optical system, in particular to a phase plate and a device in the miniaturized double-beam super-resolution optical storage optical system. Background technique [0002] The dual-beam super-resolution data storage technology is different from the traditional optical storage technology. This technology uses two beams of light to read and write simultaneously. Its basic principle is similar to the super-resolution fluorescence imaging technology that won the 2014 Nobel Prize in Chemistry. In the process of data writing, one of the beams of light is used as recording light; the other beam modulated by the phase plate has a hollow light intensity distribution characteristic, which can produce an "erasing" effect on the storage medium and suppress the loss of optical recording. process. Therefore, this double-beam optical storage method can realize super-resolu...
Claims
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IPC IPC(8): G11B7/1365G02B5/30
CPCG02B5/3083G11B7/1365
Inventor 余彬彬文静陈旭王中阳张大伟阮昊
Owner UNIV OF SHANGHAI FOR SCI & TECH