Lens testing device
AssigneeHon Hai Precision Industry Co., Ltd.
InventorI-THUN LIN
Life of this patent
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Abstract
A lens testing device includes a light source assembly, a pattern plate, and an imaging sensor. The light source assembly includes a transparent base plate, a light guide plate, and a number of illuminants. The light source assembly uses the light guide plate to uniformize light coming from the illuminants and emit the light onto the pattern plate. The imaging sensor is placed beneath the transparent base plate to sense the light passing through the pattern plate and focused by a lens under test.
Claims19
A lens testing device for testing a modulation transfer function of a lens, the lens testing device comprising:
- a pattern plate defining a plurality of patterns;
- an imaging sensor;
- and
- a light source assembly comprising:
- a transparent base plate comprising an upper surface, the transparent base plate defining a first receiving space above the upper surface, and a through hole configured for accommodating the pattern plate;
- a light guide plate comprising a light incident surface, a light emitting surface perpendicular to the light incident surface, and a plurality of microstructures formed on the light emitting surface;
- and
- at least one illuminant;
- wherein the light guide plate is accommodated in the first receiving space with the light emitting surface facing the upper surface, the at least one illuminant is placed on the upper surface and faces the light incident surface for emitting light into the light guide plate, the microstructures are configured to guide the light out of the light guide plate, and the imaging sensor is placed at an opposite side of the base plate to the light guide plate.
A lens testing device for testing a lens, the lens testing device comprising:
- a pattern plate defining a plurality of patterns;
- a transparent base plate comprising a slot receiving the pattern plate therein, the pattern plate substantially parallel to the base plate;
- a light guide plate attached on the base plate, the light guide plate having a light incident surface and a light emitting surface substantially perpendicular to the light incident surface, the light emitting surface facing the pattern plate;
- at least one illuminant facing the light incident surface;
- and
- an image sensor arranged at an opposite side of the base plate to the light guide plate to capture an image of the patterns.
Dependencies are inferred from the claim text.