A light intensity standard lamp

Abstract

The invention relates to a light intensity standard lamp, which comprises a lamp cap and a lamp housing. A glass core column and a filament are arranged inside the lamp housing. The glass core column also leads to two hollow brackets, and the guide wire is installed inside the hollow bracket; the hollow bracket is in a vertical state as a whole, and the top of the hollow bracket is first bent to form a horizontal section, and the front edge of the horizontal section Fold to form a vertical section, the filament and the guide wire are connected at the vertical section at the top of the hollow bracket, the overall height of the filament is greater than the length of the vertical section; the filament is square-wave from left to right, and the filaments are all on the same plane. The distance from the plane to the front and rear lamp housings is equal, and the distance from the left end of the filament to the left lamp housing is equal to the distance from the right end of the filament to the right lamp housing. The invention arranges the filament and the support in different planes, solves the defect that the light is blocked by the support, and increases the detection accuracy.

Description

technical field [0001] The invention belongs to a lamp, in particular to a light intensity standard lamp. Background technique [0002] In optical radiometry, the original standards for reproducing various photometric and radiometric sheets, such as blackbody furnaces and absolute radiometers, are technically complex and expensive. Therefore, it is necessary to have corresponding standard lamps to copy the bit quantity value reproduced from the original standard as a secondary standard, and to pass the value held by it step by step. Luminous Intensity Standard Lamp A standard lamp used to reproduce and communicate the value of a unit of luminous intensity. Its luminous performance is stable, and the filaments are in the same plane. The lamp housing has a specific shape that is well adapted to the requirements of the inverse square law of distances. Currently commonly used standard lamps, the filament and the bracket are on the same plane, and viewed from the side, the hei...

AI Technical Summary

Problems solved by technology

Currently commonly used standard lamps, the filament and the bracket are on the same plane, and viewed from the side, the height of the bracket is greater than the height of the filament, and the diameter of the bracket is much larger than the diameter of the filament. When testing, the filament is completely blocked by the bracket when viewed along the plane where the filament is located. , it is difficult to observe whether the projection reflected by the filament is coincident with the filament itself, which will have a negative impact on the measurement accuracy and is also unfavorable to the alignment of the filament

Images