Arrangement for assessing ambient light in a video camera
AssigneeAxis AB
InventorsJonas Hjelmström, Ola Håkansson
Life of this patent
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Abstract
An arrangement for determining an amount of light reaching an image sensor of a video camera, the video camera comprising an imaging lens system guiding a beam path towards an image sensor, wherein the arrangement comprises a transparent probing element through which the beam path passes on its way to the image sensor, and a light sensor arranged in an end of the transparent probing element. The light sensor is arranged to collect light being scattered or reflected in the transparent probing element.
Claims13
An arrangement for determining an amount of light reaching an image sensor of a video camera, said video camera comprising an imaging lens system guiding a beam path towards the image sensor, wherein the arrangement comprises:
- a transparent probing element through which the beam path passes on its way to the image sensor, and
- a light sensor arranged in an end of the transparent probing element,
- wherein the light sensor is arranged to collect light being scattered or reflected in the transparent probing element,
- wherein the transparent probing element doubles as a dummy glass filter configured to pass both visible and infrared light and being used during night-mode operation of the video camera alternate to an IR-cut filter being used during day-mode operation of the video camera.
A lens system comprising an arrangement for determining an amount of light reaching an image sensor of a video camera, said video camera comprising an imaging lens system guiding a beam path towards the image sensor, wherein the arrangement comprises:
- a transparent probing element through which the beam path passes on its way to the image sensor, and
- a light sensor arranged in an end of the transparent probing element,
- wherein the light sensor is arranged to collect light being scattered or reflected in the transparent probing element,
- wherein the transparent probing element doubles as a dummy glass filter configured to pass both visible and infrared light and being used during night-mode operation of the video camera alternate to an IR-cut filter being used during day-mode operation of the video camera.
A video camera comprising an arrangement for determining an amount of light reaching an image sensor of the video camera, said video camera comprising an imaging lens system guiding a beam path towards the image sensor, wherein the arrangement comprises:
- a transparent probing element through which the beam path passes on its way to the image sensor, and
- a light sensor arranged in an end of the transparent probing element,
- wherein the light sensor is arranged to collect light being scattered or reflected in the transparent probing element,
- wherein the transparent probing element doubles as a dummy glass filter configured to pass both visible and infrared light and being used during night-mode operation of the video camera alternate to an IR-cut filter being used during day-mode operation of the video camera.
Dependencies are inferred from the claim text.