Abstract
An apparatus (500) comprises: - an imaging device (CAM1) comprising an input element (100), a focusing unit (300) and an image sensor (DET1), wherein the input element (100) has a symmetry axis (AX1), wherein a viewing region (ZONE1) surrounds the input element (100), and wherein the imaging device (CAM1) is arranged to form an annular image (IMG1) of the viewing region (ZONE1) on the image sensor (DET1), - a curved diffractive element (G1) to provide a first diffracted light ray (LR2a) and a second light ray (LR2b, LR2c) by diffracting light (LB1) received from a first object point (P0) located in the viewing region (ZONE1) such that the first diffracted light ray (LR2a) propagates towards the axis (AX1) in a first azimuthal direction (q1), and such that the second diffracted light ray (LR2b, LR2c) propagates towards the axis (AX1) in a second different azimuthal direction (q2), - wherein the imaging device (CAM1) is arranged to form a first image point (P1a) of the first object point (P0) by focusing light of the first diffracted light ray (LR2a) to the image sensor (DET1), and the imaging device (CAM1) is arranged to form a second different image point (P1b, P1c) of the first object point (P0) by focusing light of the second diffracted light ray (LR2b, LR2c) to the image sensor (DET1).
Patent family as of 27.12.2021
FI128501 B 20200630 FI20180006073 20181213
FI20186073 A 20200614 FI20180006073 20181213
WO20120842 A1 20200618 WO2019FI50886 20191212
Link to currentpatent family on right
| Original language | English |
|---|---|
| Patent number | FI20186073 |
| IPC | G06K 9/ 00 A N |
| Priority date | 13/12/18 |
| Publication status | Published - 14 Jun 2020 |
| MoE publication type | H1 Granted patent |