Optical system, method for operating an optical system, data glasses comprising the optical system

Abstract

Optical system, data glasses comprising the optical system, method for operating the optical system (100), wherein a field of view (202) is scanned with a laser beam (204) that is focused or substantially focused in the field of view (202) for a user of the optical system (100), wherein it is detected that the user has lost sight of the field of view, wherein the laser beam (204) is defocused when it is detected that the user has lost sight of the field of view (202), and wherein the field of view (202) is scanned with the defocused laser beam (204) when it is detected that the user has lost sight of the field of view (202).

Description

State of the art

[0001] The invention is based on an optical system, a method for operating an optical system, and data glasses comprising the optical system.

[0002] In an optical system, it can be provided that a field of view is scanned with a laser beam that is focused or substantially focused in the field of view for a user of the optical system in order to display an image to the user.

[0003] If the user has lost sight of the field of view, it may be difficult for the user to regain sight of the field of view. Disclosure of the invention

[0004] The optical system and the method for operating the optical system make it easier for a user to regain control of the field of view.

[0005] The method provides that a field of vision is scanned with a laser beam that is focused or substantially focused within the field of vision for the user of the optical system, wherein it is detected that the user has lost sight of the field of vision, wherein the laser beam is defocused when it is detected that the user has lost sight of the field of vision, and wherein the field of vision is scanned with the defocused laser beam when it is detected that the user has lost sight of the field of vision. The focused or substantially focused laser beam illuminates an area that corresponds to the field of vision. The defocused laser beam illuminates a larger area in comparison with the defocused laser beam. This area is easier for the user to see.

[0006] It can be provided that it is detected that the user is viewing the field of view, whereby the field of view is scanned with the focused or substantially focused laser beam when it is detected that the user is viewing the field of view. An image displayed in the field of view is thus displayed in focus as soon as the user regains sight of the field of view.

[0007] It can be provided that at least one other field of view is additionally scanned, in particular with the laser beam, preferably defocused with respect to the other field of view, when it is detected that the user has lost sight of the field of view. This increases the overall area illuminated by the defocused laser beam.

[0008] It can be provided that the other field of view is selected from a set of fields of view that can be scanned with the laser beam. Preferably, the other field of view selected from the set is closest to the user's line of sight. This illuminates a field of view that can be viewed more easily by the user than another field of view from the set.

[0009] It may be provided that several other viewing areas are additionally scanned, in particular with the laser beam, which is preferably defocused with respect to the respective viewing area. This increases the overall area illuminated by the defocused laser beam.

[0010] It can be provided that the defocused laser beam scans with a laser power that is greater than a laser power with which the focused laser beam scans.

[0011] The optical system is configured to scan a field of view with a laser beam that is focused or substantially focused within the field of view of a user of the optical system, detect that the user has lost sight of the field of view, defocus the laser beam when it is detected that the user has lost sight of the field of view, and scan the field of view with the defocused laser beam when it is detected that the user has lost sight of the field of view. This allows the user to locate the field of view more easily than when scanning with the focused or substantially focused laser beam.

[0012] In one example, the optical system is configured to detect that the user is viewing the field of view and to scan the field of view with the focused or substantially focused laser beam when the user is viewing the field of view. The optical system displays the image in focus when the user is viewing the field of view.

[0013] The optical system is configured, for example, to scan at least one other field of view, in particular additionally with the laser beam, preferably defocused with respect to the other field of view, when it is detected that the user has lost sight of the field of view. The optical system illuminates an additional area with the defocused laser beam. The user can direct their gaze to this additional area or to the area of the original field of view. This makes it easier to locate the field of view.

[0014] The optical system is configured, for example, to select the other field of view from a set of fields of view that can be scanned with the laser beam. Preferably, the optical system is configured to select the other field of view from the set that is closest to the user's line of sight. This other field of view is particularly easy for the user to locate.

[0015] The optical system is designed, for example, to scan several other viewing areas, in particular additionally, with the laser beam that is preferably defocused with respect to the respective viewing area. The optical system illuminates several additional surfaces with the defocused laser beam.

[0016] This increases the total area illuminated by the defocused laser beam and makes it easier to find.

[0017] The optical system is designed, for example, to generate the defocused laser beam with a laser power that is greater than a laser power of the focused laser beam.

[0018] Data glasses that include the optical system have corresponding advantages.

[0019] Further advantageous embodiments can be found in the following description and the drawing. The drawing shows: Fig. 1 a schematic representation of an optical system, Fig. 2 a schematic representation of scanning a field of view of the optical system with a focused laser, Fig. 3 a schematic representation of scanning the field of view of the optical system with a defocused laser, Fig. 4 a schematic representation of scanning a distributed field of view of the optical system with a focused laser, Fig. 5 a schematic representation of scanning the distributed field of view of the optical system with a defocused laser, Fig. 6 a schematic representation of scanning several fields of view of the optical system with a focused laser, Fig. 7 is a schematic representation of scanning the multiple viewing areas of the optical system with a defocused laser, Fig. 8 a flowchart with steps of a method for operating the optical system.

[0020] In Fig. 1, an optical system 100 is shown schematically.

[0021] In the example, the optical system 100 comprises a scanning system 102 which is designed to scan a field of view 104 with a laser beam 106 which is reflected by an optical combiner 108, in particular a holographic optical element.

[0022] In the example, the scanning system 102 has an adjustable optics 110 configured to focus the laser beam 106 in the areas of the field of view 104 illuminated by the laser beam 106 during scanning. In the example, the scanning system 102 has a device 112 configured to detect that the user has the field of view 104 in view or that the user has lost sight of the field of view 104.

[0023] For example, the device 112 is configured to illuminate a pupil 114 of the user with infrared light and to detect a viewing direction of the user based on infrared light reflected by the pupil 114. For example, the device 112 is configured to detect that the user has the viewing area 104 in view when the viewing direction is directed toward the viewing area 104. For example, the device 112 is configured to detect that the user has lost view of the viewing area 104 when the viewing direction is directed next to the viewing area 104.

[0024] In one example, the optical system 100 is configured to generate the laser beam 204, in particular using a laser diode. The optical system 100 is integrated, for example, into a pair of data glasses. The scanning system 102 is integrated, for example, into a temple of the data glasses. The optical combiner 108 is integrated, for example, into a lens of the data glasses.

[0025] Fig. 2 includes a schematic representation of scanning a field of view 202 on the pupil 114 for the user of the optical system 100 with a focused laser beam 204.

[0026] Fig. 3 includes a schematic representation of scanning the field of view 202 on the pupil 114 for the user of the optical system 100 with a defocused laser beam 204.

[0027] Fig. 4 includes a schematic representation of scanning a distributed field of view 402 on the pupil 114 for the user of the optical system 100 with a focused laser beam 204.

[0028] Fig. 5 includes a schematic representation of scanning the distributed field of view 402 on the pupil 114 for the user of the optical system 100 with a defocused laser beam 204.

[0029] Fig. 6 includes a schematic representation of scanning multiple viewing areas 602 on the pupil 114 for the user of the optical system 100 with a focused laser beam 204. The optical system 100 is configured, for example, to scan a predetermined set of viewing areas 602 with the focused laser beam 204. In the example, four different viewing areas 602 are shown.

[0030] Fig. 7 includes a schematic representation of scanning the multiple viewing areas 602 on the pupil 114 for the user of the optical system 100 with a defocused laser beam 204. The optical system 100 is configured, for example, to select the viewing area 602 or the viewing areas 602 that are scanned with the defocused laser beam 204 from the set. In the example, the four viewing areas 602 are scanned with the defocused laser beam 204.

[0031] In one example, the optical system 100 is configured to generate the defocused laser beam 204 with a laser power that is greater than a laser power of the focused laser beam 204.

[0032] The optical system 100 is designed to carry out the method for operating the optical system 100 described below.

[0033] The procedure will be Fig. 8 using the example of scanning the field of view 202 for the user of the optical system 100 with the focused laser beam 204 and the defocused laser beam 204.

[0034] The method includes a step 802.

[0035] In step 802, the field of view 202 is scanned with the laser beam 204 focused in the field of view 202 for a user of the optical system 100.

[0036] The laser beam 204 is focused, for example, with the adjustable optics 110.

[0037] The method includes a step 804.

[0038] In step 804, it is checked, in particular with the device 112, whether the user has the field of view 202 in view or has lost the field of view 202 from view.

[0039] If it is detected that the user has lost sight of the field of view, step 806 is executed. Otherwise, step 802 is executed.

[0040] In step 806, the laser beam 204 is defocused.

[0041] The laser beam 204 is defocused, for example, with the adjustable optics 110.

[0042] A step 808 is then executed.

[0043] In step 808, the field of view 202 is scanned with the defocused laser beam 204.

[0044] In a step 810, it is checked, in particular with the device 112, whether the user has the field of view 202 in view again or has still lost the field of view 202 from view.

[0045] If it is detected that the user has the field of view 202 in view again, step 802 is executed. Otherwise, step 808 is executed.

[0046] The method is carried out accordingly for scanning the distributed field of view 402 and for scanning at least one other field of view 602.

[0047] The method for scanning the other field of view 602 includes, for example, scanning the other field of view 602 with the defocused laser beam 204 in addition to the field of view 602 previously scanned with the focused laser beam 204 when it is detected that the user has lost sight of the field of view.

[0048] The other viewing area 602 is selected, for example, from the set of viewing areas 602.

[0049] For example, the other field of view 602 is selected from the set that is closest to the user's line of sight at the time of selection.

[0050] For example, several other viewing areas 602 are scanned with the defocused laser beam 204.

[0051] It can be provided that the defocused laser beam 204 is adjusted, in particular with the adjustable optics 110, such that the defocused laser beam 204 is defocused with respect to the field of view 602 scanned by the respective laser beam.

[0052] In the example, only one of the four viewing areas 602 is visible during operation with the focused laser beam 204. In the example, two, three, or four of the four viewing areas 602 are visible during operation with the focused laser beam 204.

[0053] For example, the defocused laser beam 204 scans with a laser power that is greater than a laser power with which the focused laser beam 204 scans.

Claims

[1] Method for operating an optical system (100), characterized by that a field of view (202) is scanned (802) with a laser beam (204) that is focused or substantially focused in the field of view (202) for a user of the optical system (100), wherein it is detected (804) that the user has lost sight of the field of view, wherein the laser beam (204) is defocused (806) when it is detected that the user has lost sight of the field of view (202), and wherein the field of view (202) is scanned (808) with the defocused laser beam (204) when it is detected that the user has lost sight of the field of view (202). [2] Method according to claim 1, characterized by that it is detected (810) that the user has the field of view in view, wherein the field of view is scanned with the focused or substantially focused laser beam (802) when it is detected that the user has the field of view in view. [3] Method according to one of the preceding claims, characterized by that at least one other field of view (602) is scanned, in particular additionally, with the laser beam (204) which is preferably defocused with respect to the other field of view (602), when it is detected that the user has lost sight of the field of view (602). [4] Method according to claim 3, characterized by that the other viewing area (602) is selected from a set of viewing areas (602) that can be scanned with the laser beam (204). [5] Method according to claim 4, characterized by that the other field of view (602) selected from the set is closest to a viewing direction of the user. [6] Method according to claim 3, characterized by that several other viewing areas (602) are scanned, in particular additionally, with the laser beam (204) which is preferably defocused with respect to the respective viewing area (602). [7] Method according to one of the preceding claims, characterized by that the defocused laser beam (204) scans with a laser power that is greater than a laser power with which the focused laser beam (204) scans. [8] Optical system (100), characterized by that the optical system (100) is designed to scan a field of view (202) with a laser beam (204) that is focused or substantially focused in the field of view (202) for a user of the optical system (100), to detect that the user has lost sight of the field of view (202), to defocus the laser beam (204) when it is detected that the user has lost sight of the field of view (202), and to scan the field of view (202) with the defocused laser beam (204) when it is detected that the user has lost sight of the field of view (202). [9] Optical system (100) according to claim 8, characterized bythat the optical system (100) is designed to detect that the user has the field of view (202) in view and to scan the field of view (202) with the focused or substantially focused laser beam (204) when it is detected that the user has the field of view (202) in view. [10] Optical system (100) according to one of claims 8 or 9, characterized by that the optical system (100) is designed to scan at least one other field of view (202), in particular additionally with the laser beam (204) which is preferably defocused with respect to the other field of view (402), when it is detected that the user has lost sight of the field of view (202). [11] Optical system (100) according to claim 10, characterized by that the optical system (100) is designed to select the other viewing area (602) from a set of viewing areas (602) that can be scanned with the laser beam (204). [12] Optical system (100) according to claim 11, characterized by that the optical system (100) is designed to select the other field of view (602) from the set that is closest to a viewing direction of the user. [13] Optical system (100) according to claim 10 to 12, characterized by that the optical system (100) is designed to scan a plurality of other viewing areas (602), in particular additionally with the laser beam (204) which is preferably defocused with respect to the respective viewing area (602). [14] Optical system (100) according to claims 10 to 13, characterized by that the optical system (100) is designed to generate the defocused laser beam (204) with a laser power that is greater than a laser power of the focused laser beam (204). [15] Data glasses, characterized by that the data glasses comprise the optical system (100) according to one of claims 11 to 14.

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