Abstract: The invention relates to a display apparatus which comprises an illumination device for emitting light, a spatial light modulation device for modulating incident light, an optical system and a control device. The optical system is provided for generating at least one image of the spatial light modulation device as a segment, where the optical system further comprises a deflection device for directing the image of the spatial light modulation device to a defined position in the field of view of a user. The control device is coupled to the illumination device and the deflection device and embodied to switch the illumination device on the basis of a control of the deflection device.

Abstract: Methods and systems for measuring particles within a flow are provided. An aircraft transports a high volume sample rate holographic measurement instrument through a particle-containing volume of interest along a reference axis X (time). As the instrument moves relative to the volume of interest, the holographic measurement instrument transmits a collimated light beam across the volume of interest along an optical axis Z. The light beam interacts with particles contained within the volume of interest, and a high-speed, one-dimensional detector array detects incident light reflecting patterns of light intensity levels that are associated with the interaction between the light beam and the particles.

Abstract: Methods and systems for measuring particles within a flow are provided. An aircraft transports a high volume sample rate holographic measurement instrument through a particle-containing volume of interest along a reference axis X (time). As the instrument moves relative to the volume of interest, the holographic measurement instrument transmits a collimated light beam across the volume of interest along an optical axis Z. The light beam interacts with particles contained within the volume of interest, and a high-speed, one-dimensional detector array detects incident light reflecting patterns of light intensity levels that are associated with the interaction between the light beam and the particles.