Light-emitting diode arrangement
First Claim
1. Light-emitting diode arrangement with a light-emitting diode that is light-transmissive in an axial direction, for use in examining instruments for ophthalmic optics, characterized in that the light-emitting diode is combined with an additional, switchable light source, the light of which penetrates the light-emitting diode from its rear face toward its light-emitting side.
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Accused Products
Abstract
A light-emitting diode arrangement with a light-emitting diode that is light-transmissive in an axial direction of the type used in examining instruments for opthalmic optics. The light-emitting diode serves as a constant light source in conjunction with a diffusion disk, such as for fixation point stimuli, while the disk also serves as a stimulus that is lit by an additional, switchable light source, such as an incandescent lamp, whose light is transmitted through a light guide, such as an optical fiber, through the light-emitting diode to the disk. In a preferred embodiment, a color filter is arranged between the additional light source and the light-emitting diode and both the additional light source and light-emitting diode are axially displaceable relative to the diffusion disk so as to enable adjustment of their respective luminous densities.
34 Citations
7 Claims
- 1. Light-emitting diode arrangement with a light-emitting diode that is light-transmissive in an axial direction, for use in examining instruments for ophthalmic optics, characterized in that the light-emitting diode is combined with an additional, switchable light source, the light of which penetrates the light-emitting diode from its rear face toward its light-emitting side.
Specification