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A liquid crystal tunable filter and its configuration method

A technology for tuning filters and filters, applied in static indicators and other directions, can solve problems such as affecting the field of view and reducing transmittance, and achieve the effects of no mechanical rotation, high pass rate, and high shielding rate.

Inactive Publication Date: 2011-12-28
SHENZHEN KINGWAY OPTOELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To solve this problem, more stages are required for the Leo configuration or split element configuration, and more birefringent elements for the Salk configuration, which in turn cause a decrease in transmission and affect the field of view

Method used

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  • A liquid crystal tunable filter and its configuration method
  • A liquid crystal tunable filter and its configuration method
  • A liquid crystal tunable filter and its configuration method

Examples

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Embodiment Construction

[0042] The configuration method of the present invention can produce many different specific configuration structures, and the present invention will be described in detail below in conjunction with examples.

[0043] Corresponding to a four-stage cascaded Leo configuration in the prior art (see figure 1 ), the configuration method of the present invention can produce several new specific configuration structures, and we only enumerate three kinds of specific configuration structures here (referring to Figure 9 , Figure 10 ,and Figure 11 ). Figure 9 The configuration shown is a combination of the first two consecutive Leo cascades and the last two consecutive Leo cascades, using four birefringent optical elements in each combination. Figure 10 and Figure 11 The configuration shown is the combination of three consecutive Leo cascades, and seven birefringent optical elements are used in the combination. The difference is that the positions of the three consecutive casc...

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Abstract

The invention discloses a liquid crystal tunable filter and a configuration method thereof. The filter includes several cascaded Leo configuration filter units, and the Leo configuration filter unit consists of polarizers on both sides and a middle A birefringent optical element is formed, wherein part or all of the Leo configuration filter units are combined in two consecutive cascades or three consecutive cascades to form a combined unit. The merge method is stacked or fan merged. The birefringent optical element is a liquid crystal tunable wave plate, a fixed wave plate or a combination of a liquid crystal tunable wave plate and a fixed wave plate. The liquid crystal tunable filter of the present invention has the advantages of high pass rate, narrow half-width, high shielding rate, adjustable spectral range, strong stability, no need for mechanical rotation, and real-time controllable advantages. It can be widely used in Imaging, biology, medicine, materials, optics, optoelectronics, astronomy and other fields.

Description

technical field [0001] The invention relates to a tunable filter, in particular to a liquid crystal tunable filter and a configuration method thereof. Background technique [0002] There are mainly the following types of wavelength tunable filters: tunable filters based on mode coupling, tunable filters based on semiconductor laser structure, fiber Bragg gratings (FBGs), etc. [0003] Tunable filters based on mode coupling are based on various mode couplings such as acousto-optic, electro-optic or magneto-optical effects. The incident light is first processed by a single mode, such as the transverse electric (TE) mode, which is converted into another mode, such as the transverse magnetic (TM) mode, by periodic perturbation. Acoustic, electric or magnetic fields can be used to generate periodic perturbations depending on correlation effects, under which only light waves within a very narrow wavelength range satisfying the mode coupling conditions can pass through, resulting ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/133
Inventor 唐守平
Owner SHENZHEN KINGWAY OPTOELECTRONICS
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