Abstract: A radiance measuring device comprises an imaging device, a light measuring device (2) and a connection seat (3) for connecting the imaging device with the light measuring device (2). The emission port of the imaging device corresponds to the incidence port of the light measuring device (2). The imaging device comprises an imaging lens (1-1) and an aperture diaphragm (1-2), and the aperture diaphragm (1-2) is located on the front focal plane of the imaging lens (1-1).

Abstract: A goniophotometer has a main rotating table, a sync-rotating table, a luminaire rotating table and light detecting tubes (4-1, 4-2). The main rotating table has a main rotating axis (1-2) and a main mirror (1-4) reflecting the light from a luminaire under test (5). The sync-rotating table has a sync-rotating axis (2-2) and a sync-mirror (2-4) located in the reflection path of the main mirror (1-4). The sync-rotating axis (2-2) is coincident with the main rotating axis (1-2). The luminaire rotating table has a luminaire rotating axis (3-2) which can drive the rotation of the luminaire under test (5). The luminaire rotating axis (3-2) is perpendicular to the main rotating axis (1-2). The light detecting tubes (4-1, 4-2) are arranged in the emergent light path to detect the luminous intensity of the luminaire under test (5) in different direction.

Abstract: A radiance measuring device comprises an imaging device, a light measuring device (2) and a connection seat (3) for connecting the imaging device with the light measuring device (2). The emission port of the imaging device corresponds to the incidence port of the light measuring device (2). The imaging device comprises an imaging lens (1-1) and an aperture diaphragm (1-2), and the aperture diaphragm (1-2) is located on the front focal plane of the imaging lens (1-1).