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Hiperreflex lamp with collimator for automotive signalling functions

IP.com Disclosure Number: IPCOM000081728D
Publication Date: 2005-Feb-28
Document File: 1 page(s) / 15K

Publishing Venue

The IP.com Prior Art Database

Abstract

ID693264

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ID 693264

Publication ID693264

Hiperreflex lamp with collimator for automotive signalling functions

The Hiperreflex lamp has an intensity distribution that is optimised for coupling light into a lightwave guide. The angle is approximately 2x 30°, which is too wide for most signalling functions. A collimator is placed in front of the Hiperreflex lamp in order to reduce the beam angle.

The Hiperreflex incandescent lamp, with a reflector integrated in the bulb, concentrates the light in an area with a size of the order of 100 mm2 at a few mm in front of the lamp. The lamp itself has a diameter which is smaller than 25 mm. As a consequence, the light is distributed over an angle of the order of 30° or larger. A (solid or open) collimator is placed in front of the lamp in order to collimate the light into horizontal and vertical angles that are required for automotive signalling functions. Moreover, this light can be coupled in to a lightwave guide. Because the in - coupled light is more concentrated, the out -coupled light is also more concentrated and more adapted to signalling functions. Computer model calculations have confirmed this.

Figure1. Hiperreflex without a collimator, with a collimator with straight walls and with a parabolic collimator. The collimator narrows the beam angle.

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Forward

Out coupling

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