Wideband ambient light rejection

摘要

Optical apparatus includes an image sensor and objective optics, which are configured to collect and focus optical radiation over a range of wavelengths along a common optical axis toward a plane of the image sensor. A dispersive element is positioned to spread the optical radiation collected by the objective optics so that different wavelengths in the range are focused along different, respective optical axes toward the plane.

主权项

1. Optical apparatus, comprising:
an image sensor, which comprises an array of sensor elements, which generate respective signals, and outputs electronic images in which each pixel has a pixel value corresponding to a signal from a respective sensor element; objective optics, which are configured to collect and focus optical radiation over a range of wavelengths along a common optical axis toward a plane of the image sensor; and a dispersive refractive element, which is positioned to spread the optical radiation collected by the objective optics so that different wavelengths in the range are focused along different, respective optical axes toward the plane.