Exposure device for recording hologram, method for recording hologram, and method for controlling exposure device for recording hologram
A hologram and equipment technology, applied in the direction of hologram light source/light characteristics, hologram optical components, holographic technology, etc., to achieve the effect of improving image quality and optimizing effect
Active Publication Date: 2020-06-05
ROBERT BOSCH GMBH
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- Application Information
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Problems solved by technology
Conventional holograms capable of reconstructing the original wavefront of a holographic object cannot normally be produced with this holographic stereogram printer
Method used
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[0054] figure 1 A schematic diagram showing large-area recording of the holographic lens 100 by two point light sources 102 , 104 .
[0055] figure 2 A schematic diagram showing sequential recording of the holographic lens 200 by two point light sources 202 , 204 is shown. Through multiple sub-holographic figure 1 , 2 ...n sequential recording to record holograms in figure 2 The principle shown in .
[0056] figure 1 and figure 2 Shown is a comparison of large-area analog recording under a holographic imaging element with sequential (digital) recording using the example of a holographic off-axis parabolic mirror.
[0057] image 3 A schematic diagram of an exposure apparatus 300 according to an embodiment is shown. Shown is a possible structure of the entire optical system for producing a hologram by exposing a photosensitive holographic recording material 302 (here a holographic optical element) including an exposure device 300, wherein the solid lines represent t...
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Abstract
The invention relates to an exposure device (300) for recording a hologram. The exposure device (300) comprises at least one modulation unit (304) embodied to produce a modulation beam (310) that represents a reference beam and / or an object beam by impressing at least one modulation representing a holographic element of the hologram onto a laser beam (308, 338). Moreover, the exposure device (300)comprises at least one reduction unit (312) embodied to produce a modified modulation beam (318) by using the modulation beam (310), the modified modulation beam (318) having a smaller beam diameterthan the modulation beam (310). Furthermore, the exposure device (300) comprises at least one objective lens unit (320) embodied to steer the modified modulation beam (318) through an immersion mediumonto a recording material (302) in order to record the hologram by exposing the recording material (302) to the modified modulation beam (318).
Description
technical field [0001] The invention proceeds from a device or a method according to the class of the independent claims. Background technique [0002] Holographic Optical Elements (HOEs for short) are opening up more and more new markets and application fields through new holographic materials available on the market and miniaturization of laser sources. Possible areas of application such as data glasses or heads-up displays are becoming more and more interesting and can be achieved or improved by using holographic optics. [0003] To record a hologram, for example, two laser sources coherent to each other (reference wave and object wave) are caused to interfere on a photosensitive holographic layer. The resulting interference pattern is then recorded onto the holographic layer. By illuminating the interference structure with a reference wave, the object wave can be reconstructed. For example, the optical functionality of a volume hologram can be written into the hologra...
Claims
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IPC IPC(8): G03H1/04G02B21/33G03H1/26G03H1/02G03H1/22
CPCG03H2001/2605G03H1/0476G03H2001/0491G02B6/34G02B13/24G02B21/33G03H1/0248G03H1/2294G03H1/26G03H2001/0224G03H2001/0413G03H2001/0415G03H2001/048G03H2001/2226G03H2001/2271G03H2223/17G03H2223/25G03H2225/60G03H1/0408G03H2001/0439G03H2001/0473G02B5/32G03H1/02G03H1/0402G03H2001/0216G03H2222/45G03H2225/22G03H2225/32G03H2227/05
Inventor R·菲斯M·吉克
Owner ROBERT BOSCH GMBH