Prism and centerline lamp

Abstract

The invention relates to a prism, comprising a light incident surface, a reflection surface and a light emergent surface. Light enters through the light incident surface and exit through the light emergent surface after being reflected through the reflection surface. The included angle between the light incident surface and the reflection surface ranges from 56 degrees to 66 degrees; the included angle between the reflection surface and the light emergent surface ranges from 92 degrees to 102 degrees; the light incident surface is provided with a raised line and a groove integrally connected with the raised line; the raised line and the groove are repeated at intervals to form a corrugated light incident surface; the raised line and the groove are in smooth transition and the cross section is in a circular arc shape. The prism is applied in centerline lamps of navigational lamps; by setting the prism with the corrugated light incident surface in the centerline lamp, the distributing evenness of light is improved; the incident light passing through the corrugated light incident surface can be evenly distributed in the required light distribution area of the lamp; and by setting the included angle between the light incident surface and the reflection surface as well as the included angle between the reflection surface and the light emergent surface, the requirement for large-angle light distribution in straightaway of taxiways in airports is achieved and the volume of the prism is reduced, thus the structural strength of the centerline lamp is effectively enhanced.

Description

【Technical field】 [0001] The invention relates to an airport navigation light, in particular to a prism and centerline light. 【Background technique】 [0002] The prism at the turn of the taxiway and runway is the most important optical device in the center line light. Its function is to diffuse the light emitted by the light source to a certain angle, so that the light intensity can meet the requirements within the specified range. In conventional prisms, the light-incident surface is flat and cannot diffuse light uniformly. [0003] In actual use, in order to meet the light distribution requirements of some large angles, it is often necessary to increase the overall size of the prism. However, this will cause the size of the prism to be too large, and the outgoing light at the light incident surface of the prism close to or directly facing the light source is concentrated, and the light intensity is high, while the light intensity of the outgoing light at the light inciden...

AI Technical Summary

Problems solved by technology

However, this will cause the size of the prism to be too large, and the outgoing light at the light incident surface of the prism close to or directly facing the light source is concentrated, and the light intensity is high, while the light intensity of the outgoing light at the light incident surface of the prism far away from the light source is weak. Uneven distribution of light intensity

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