公开(公告)号：WO2023025693A2

公开(公告)日：2023-03-02

申请号：PCT/EP2022/073243

申请日：2022-08-19

Applicant: JT INTERNATIONAL SA

Inventor： DEBERGH, Patrick

IPC: A24F40/50 ,  G02B3/14 ,  G02B26/00 ,  G01J1/04 ,  A24D1/02 ,  A24D1/20 ,  A24F40/20 ,  A24F40/51 ,  G01J1/0411 ,  G01J1/0437 ,  G01J1/0448 ,  G02B26/005

Abstract: A smoking device (2) comprises an optical sensing system (5) for reading indicia (10) on a consumable article (1). Means are provided for adapting a characteristic of the optical sensing system (5) in response to a distance of the indicia (10) from the optical sensing system (5). The adapting means may change the focal length of an optical element (120) by applying a potential difference to change a refractive index of the optical element (120) or to change the curvature of an optical surface (130). The optical surface (130) may be an interface between two immiscible liquids (122,124) that have different electrical properties. The adapting means may alternatively move an element of the optical sensing system (5) in response to the distance of the indicia (10), for example by changing a shape of a support of an optical element (120). The optical element may comprise a pinhole (20) and the adapting means may change the size of its aperture.