Optical device i.e. head-up display, for use in vehicle for displaying images representing e.g. air speed, has two reflectors for reflecting light with respective frequencies, where one of reflectors is arranged behind another reflector

摘要

The device has a first reflector (220) arranged in an optical axis for reflecting a light with a first frequency (260). The first reflector is transparent for the light with a second frequency (263) that is different from the first frequency. A second reflector (230) is arranged in the optical-axis behind the first reflector and is formed to reflect the light with the second frequency. The first reflector represents an optical-bandpass-filter, which exhibits a frequency-permeable characteristic in form of a comb. Independent claims are also included for the following: (1) a method for manufacturing an optical device (2) a method for operating an optical device.