Luminous intensity detection standard lamp

Abstract

The invention relates to a luminous intensity detection standard lamp. The luminous intensity detection standard lamp comprises a lamp holder and a glass bulb, wherein a core column and filaments are arranged in the glass bulb, the upper end face of the glass bulb is a circular-arc-shaped surface, the glass bulb is of an inverted-cone shape, the inner wall of the glass bulb is blackened, only one rectangular or square light-pervious window is formed in the portion, arranged in front of the plane where the filaments are located, of the glass bulb, a fixing base is connected between two guide wires, a plurality of molybdenum wire hook sets are arranged on the fixing base, each molybdenum wire hook set comprises a high molybdenum wire hook and a low molybdenum wire hook, the hook portion of the high molybdenum wire hook and the hook portion of the low molybdenum wire hook of each molybdenum wire hook set are arranged on the same vertical line, the filaments penetrate through the hook portions arranged on the tops of the molybdenum wire hooks in sequence from left to right in a square wave shape mode, the filaments are arranged on the same plane, and the filaments are arranged in the center of the light-pervious window. According to the luminous intensity detection standard lamp, adjustment of the filaments is simplified, and only the situation that the filaments are located in the center of the light-pervious window needs to be ensured; due to the facts that the filaments are of a square-wave shape, and the length of the portion, in the perpendicular direction, of each filament is larger than that of the portion, in the horizontal direction, of the filament, the filaments cannot easily fall off, working stability is good, and the service life is long.

Description

technical field [0001] The invention relates to a lamp, in particular to a standard lamp for detecting luminous intensity. Background technique [0002] The standard lamp for luminous intensity detection is used to reflect and transmit the value of the luminous intensity unit (candela cd), and is an important standard instrument in the measurement of light radiation. Standard lamps for luminous intensity testing are generally made of incandescent lamps or tungsten halogen lamps. In order to make the filament the only illuminant of the standard lamp for luminous intensity testing, stray light from glass bulbs and other filament supports should be minimized. At present, typical standard lamps for luminous intensity detection are generally only composed of bulbs and lamp holders, and stray light has a greater impact, and it is difficult to obtain stable and uniform light intensity values. Some standard lamps for luminous intensity detection use An overly complex structure incr...

AI Technical Summary

Problems solved by technology

At present, typical standard lamps for luminous intensity detection are generally only composed of bulbs and lamp holders. Stray light has a great influence, and it is difficult to obtain stable and uniform light intensity values. Some standard lamps for luminous intensity detection use Too complex structure increases production cost

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