Method for ascertaining a diffraction characteristic of a hologram element for smart glasses

A method for ascertaining a diffraction characteristic of a hologram element for smart glasses, the method comprising the following steps:

• outputting a light beam to an observation position on the hologram element using a light source, wherein the light beam includes at least one predefined wavelength and at least one sending parameter associated with the wavelength;
• acquiring at least one reflection beam diffracted at the observation position and/or transmission beam of the light beam having the predefined wavelength and transmitted through the hologram element at the observation position using at least one detector, wherein a detection parameter of the reflection beam and/or of the transmission beam is acquired at the predefined wavelength;
• and
• comparing the sending parameter with the detection parameter to ascertain the diffraction characteristic of the hologram element at the observation position.

A control unit configured to ascertain a diffraction characteristic of a hologram element for smart glasses, the control unit configured to:

• output a light beam to an observation position on the hologram element using a light source, wherein the light beam includes at least one predefined wavelength and at least one sending parameter associated with the wavelength;
• acquire at least one reflection beam diffracted at the observation position and/or transmission beam of the light beam having the predefined wavelength and transmitted through the hologram element at the observation position using at least one detector, wherein a detection parameter of the reflection beam and/or of the transmission beam is acquired at the predefined wavelength;
• and
• compare the sending parameter with the detection parameter to ascertain the diffraction characteristic of the hologram element at the observation position.

A non-transitory machine-readable storage medium on which is stored a computer program ascertaining a diffraction characteristic of a hologram element for smart glasses, the computer program, when executed by a computer, causing the computer to perform the following steps:

• outputting a light beam to an observation position on the hologram element using a light source, wherein the light beam includes at least one predefined wavelength and at least one sending parameter associated with the wavelength;
• acquiring at least one reflection beam diffracted at the observation position and/or transmission beam of the light beam having the predefined wavelength and transmitted through the hologram element at the observation position using at least one detector, wherein a detection parameter of the reflection beam and/or of the transmission beam is acquired at the predefined wavelength;
• and
• comparing the sending parameter with the detection parameter to ascertain the diffraction characteristic of the hologram element at the observation position.