Patent ID: 11960157
Assignee: ESSILOR INTERNATIONAL
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 13:
14. A variable optical transmission device comprising:
variable transmission optics means for varying an optical transmission between an initial transmission value and a target transmission value; and
control means for controlling a transmission parameter of the variable transmission optics means, wherein the control means control a response duration of the variable transmission optics means as a function of the initial transmission value and the target transmission value, wherein
the control means control the response duration depending on a sign of a difference between the initial transmission value and the target transmission value, and
the control means control:
a first response duration for lowering an optical transmission of the variable transmission optics means from an initial transmission value to a target transmission value, and
a second response duration for increasing the optical transmission from the initial transmission value to the target transmission value, the first response duration being different from the second response duration.