Image Sensors and Cameras Testing and Calibration
Testing, calibration or characterization of devices such as image sensors, industrial cameras, hyper-spectral imaging sensors and optoelectronic detectors requires the use of light sources with highly uniform light distribution. Gigahertz Optik GmbH produces a wide range of homogeneous (uniform) light sources with integrating spheres and LED panels with which the uniformity and performance of image sensors and industrial cameras can be determined. Some application examples are presented on this page.
Reference Light Source for Sensitivity Adjustment of Combined Rain and Ambient Light Sensors
Integrating sphere light sources are widely used in the characterization and calibration of imaging sensors and cameras. In this application, the integrating sphere light source serves as a reference light source that can uniformly illuminate all of the many individual light-sensitive detectors (pixels). This enables the relative sensitivity of the pixels to be adjusted as required.
Quantifying the Veiling Glare of Imaging Systems
Veiling glare is most apparent when bright light spots or bright scenes are within the field of view of an imaging system. It is produced by unwanted scattered and reflected light from the image forming beam within the camera system that eventually impinges the image plane. It doesn’t form an image, but may be quite uniformly distributed resulting in image fogging and a reduction in image contrast. There are numerous causes of veiling glare including internal multiple reflections between the surfaces of lenses; scatter from lens imperfections; scatter and reflections from components and internal surfaces of the camera body; fluorescence; bulk scatter within lenses.