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Reflective phase type focal area light distribution regulating system

A focal area and light intensity distribution technology, applied in optics, optical components, nonlinear optics, etc., can solve the problems of inconvenient adjustment of light intensity distribution in the focus area and difficulty in precision machining of apertures, so as to achieve focus light intensity distribution, Realize the effect of focal light intensity distribution adjustment and convenient adjustment

Inactive Publication Date: 2005-02-16
SHANGHAI DAHENG OPTICS & FINE MECHANICS
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AI Technical Summary

Problems solved by technology

Although the optical focal point light intensity distribution adjustment method in the prior art has certain advantages, there are still deficiencies: 1) using a transmission-type pure phase diaphragm, the precision machining of this type of diaphragm has certain difficulties; 2) the focus It is inconvenient to adjust the light intensity distribution in the area

Method used

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  • Reflective phase type focal area light distribution regulating system
  • Reflective phase type focal area light distribution regulating system
  • Reflective phase type focal area light distribution regulating system

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Embodiment Construction

[0022] see first figure 1 , figure 1 It is a schematic diagram of a specific embodiment of the reflective phase-type focus area light intensity distribution adjustment system of the present invention. It can be seen from the figure that the reflective phase-type focus area light intensity distribution adjustment system of the present invention includes a light source 1, and the light emitted by the light source 1 is a line For polarized light, a beam expander 2, a polarizing beam splitter 3, a quarter-wave plate 5 and a phase modulation mirror 6 are arranged sequentially in the forward direction of the beam. The transmission polarization direction of the polarization beam splitter 3 is the same as that of the incident light, and forms an angle of 45 degrees with the optical axis direction of the quarter wave plate 5 . The incident light is reflected by the phase modulating mirror 6 and passes through the quarter-wave plate 5, and then reflected by the polarizing beam splitter...

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Abstract

The present invention relates a reflective phase type focal area light-intensity distribution regulating-system. the composition of said system includes a light source, along forward direction of light beam sent by said light source successively are placed a beam splitter anda phase modulation reflector by same optical axis, said beam splitter makes angle of 45 deg. with optical circuit, and the reflecting face of the phase modulation reflector is perpendicular to optical axis; and an object-lens positioned on the reflective optical circuit of said beam splitter. The described phase modulation reflector is formed from several reflective components, and the reflective component is connected with its correspondent displacement driver by means of correspondent connecting bar. The regulation of axial position of reflecting face of reflective component can change the light-intensity distribution of focal area, and its regulating process is convenient.

Description

Technical field: [0001] The invention relates to a light intensity adjustment system, in particular to a reflective phase type focal area light intensity distribution adjustment system. It is mainly used in optical systems such as optical storage systems, dark field optical microscopes, optical tweezers and laser processing. technical background: [0002] The light intensity distribution in the optical focal area is very important for some optical systems. For example, in an optical storage optical system, high-density optical storage requires that the size of the optical focus in the optical system be small in the lateral direction; the size in the direction of the optical axis be large, that is, have a larger depth of focus. In the dark-field optical microscope system, it is required that the light intensity distribution of the spot with the focal point on the focal plane is uniform, symmetrical, and adjustable in size. In the optical tweezers system, the uneven distribu...

Claims

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Application Information

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IPC IPC(8): G02B5/00G02F1/01
Inventor 高秀敏徐文东
Owner SHANGHAI DAHENG OPTICS & FINE MECHANICS
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