Light trap systems and surfaces
AssigneeWelch Allyn, Inc.
InventorsVivian L. Hunter, Joshua F. Hess, Scott A. Martin
Life of this patent
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Abstract
A device including a body having a first surface to receive stray light within a housing of a device and a second surface opposite the first surface. The device includes a plurality of openings at the first surface to receive the stray light. The plurality of openings connected to one or more light paths within the body to terminate within the body or at the second surface to prevent the stray light from reflecting within the housing. The plurality of openings define channels that extend into the body to reflect received light to a distal end of the channel by reflecting off one or more surfaces within the body.
Claims20
A stray light control device comprising:
- a planar body defined by a first plane and having a first surface with a first area to receive stray light within a housing of a device and a second surface opposite the first surface;
- a first set of louvers disposed adjacent the first surface, the first set of louvers:
- including a first plurality of angled baffles arranged substantially parallel with a first axis extending across the first plane, the first set of louvers dividing the first area into a first plurality of apertures;
- and
- having a first depth substantially perpendicular to the first plane from the first surface to an intermediate position of the planar body and defining a second area at the intermediate position;
- and
- a second set of louvers disposed between the first set of louvers and the second surface, the second set of louvers:
- including a second plurality of angled baffles arranged substantially perpendicular to the first axis and dividing the second area into a second plurality of apertures;
- and
- having a second depth substantially perpendicular to the first plane from the intermediate position of the planar body to a second intermediate position and defining a third area at the second intermediate position.
A system comprising:
- a housing for an imaging system;
- one or more optical components including an image sensor disposed within the housing;
- and
- a stray light control device comprising:
- a body defined by a first plane and having a first surface and a second surface opposite the first surface;
- a first set of louvers disposed adjacent the first surface, the first set of louvers including a first plurality of angled baffles arranged substantially parallel with a first axis;
- and
- a second set of louvers disposed between the first set of louvers and the second surface, the second set of louvers including a second plurality of angled baffles arranged substantially perpendicular to the first axis.
A stray light control device comprising:
- a body defined by a first plane and having a first surface with a first area to receive stray light within a housing of a device and a second surface opposite the first surface;
- a plurality of openings defined in the first surface to divide the first area into a plurality of regions;
- and
- a plurality of channels defined within the body extending from the plurality of openings in the first surface;
- a channel of the plurality of channels:
- extending on a curved path within the body from the first surface towards the second surface;
- having a first cross-sectional area adjacent the first surface;
- and
- having a second cross-sectional area at a distal end of the channel, the second cross-sectional area less than the first cross-sectional area.
Dependencies are inferred from the claim text.