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8.4. Spherical photometer for measuring luminous flux

A spherical photometer for measuring the luminous flux of various light sources is an integrating sphere with an inner diameter of 200 mm and two holes:

1) for the investigated light source,

2) for the radiation receiver.

A shield, which prevents direct light from the source from entering the radiation receiver, is installed inside the sphere.

IS_light-flux.jpg

Figure: 1. Appearance of a spherical photometer for measuring luminous flux