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Apparatus for homogenizing light

A technology of uniform light and lens array, applied in optics, optical components, instruments, etc., can solve the problem of insufficient numerical aperture, and achieve the effect of low cost and large numerical aperture

Active Publication Date: 2008-11-12
LIMO GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the numerical apertures achievable by known means for homogenizing light are not sufficient for some fields of application

Method used

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  • Apparatus for homogenizing light

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Embodiment Construction

[0019] In an alternative embodiment not explicitly shown here, there is the possibility that the light exit surface of the first substrate 10 is equipped with a further lens array. The lens array may, for example, comprise cylindrical lenses whose cylindrical axes may be oriented perpendicularly to the cylindrical axes of the cylindrical lenses of the first lens array 11 .

[0020] The second substrate 20 , which is spaced apart from the first substrate 10 in the direction of beam propagation (z direction), has a second lens array 21 on a light entry surface facing the light exit surface of the first substrate 10 . In this exemplary embodiment, the light exit surface of the second lens array 21 is also realized flat or at least substantially flat. It can be seen that the second lens array 21 comprises a first lens 22 realized with a convex surface and a second lens 23 realized with a concave surface, which in this embodiment are likewise cylindrical lenses whose cylindrical ax...

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Abstract

The invention relates to a device for homogenising light, said device comprising a first lens array (11) provided with a number of convex lenses (12), and at least one second lens array (21) which is arranged at a distance from the first lens array in the beam scattering direction and through which the light refracted by the first lens array (11) can pass. The second lens array (20) comprises a number of first lenses (22) that are respectively arranged at a distance from each other, at least one of the first lenses (22) of the second lens array (21) being associated with each convex lens (12) of the first lens array (11). The convex lenses (12) of the first lens array (11) have a smaller curvature than the first lenses (22) of the second lens array (21) associated with said convex lenses.

Description

technical field [0001] The invention relates to a device for homogenizing light, comprising a first lens array with a plurality of convex lenses and at least one second lens array spaced apart from the first lens array in the beam propagation direction, wherein the first The light refracted by a lens array can pass through the second lens array, wherein the second lens array has a plurality of first lenses respectively spaced from each other with a gap, wherein at least one first lens in the first lenses of the second lens array corresponds to for each convex lens of the first lens array. Background technique [0002] Devices of the type mentioned above are used, for example, to homogenize the relatively inhomogeneous laser light emitted by laser diode assemblies. The light emerging from such a device and refracted by the individual lenses of the lens array is distributed uniformly over the angular area. Prior art means for homogenizing light consist of relatively small or...

Claims

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Application Information

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IPC IPC(8): G02B27/09G02B3/00
CPCG02B3/0062G02B27/0961G02B5/02
Inventor H·甘泽T·米特拉
Owner LIMO GMBH
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