| 摘要 |
Disclosed is a system to measure vignetting due to camera lens. According to the present invention, the vignetting measurement system comprises: an integrating sphere (10) collecting light irradiated from a light source (100), uniformly distributing the light therein through repeated reflection, and having a light outlet (102) formed on the bottom; a guide part (11) installed in the bottom of the light outlet (102) arranged on the bottom of the integrating sphere (10) and guiding an autocollimator (120) to be horizontally slid; an autocollimator module (12) horizontally slid along the guide part (11) to be entered into the light outlet (102) in tilt alignment and focusing operations or to be drawn out from the integrating sphere (10) in the measurement of ambient light and having the autocollimator (120) mounted in one side to emit parallel light (122) and a reflection prism (124) formed in the other side to vertically reflect downward the parallel light (122); an image sensor (13); a data processing part (14); and a control computer (15). The uniform light source is positioned close to the camera lens by the autocollimator (120) such that the focal point of the lens (L) can be matched on the surface of an image sensor (13); thereby measuring vignetting. |
