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US 7,256,941 B2Granted
Lens array
AssigneePixon Technologies Corp.
InventorsRong Yaw Wu, Chen Sheng-Li, Shih Che Chen
Life of this patent
Estimating the term…
Abstract
An optical lens array featuring low cost and simple manufacture. The lens array has two lens sections separated by spacers, with a stop on the front surface. An optional wraparound frame protects the lens array from external light. The spacers and stop, as well as the optional frame, are made of black polymer to block unwanted scattered or external light. The lens sections, stop, spacers, and frame can all be made by injection-molding. Notches, locating holes, posts, and ears serve to orient and align the parts, and to prevent incorrect assembly.
Claims17
A lens array comprising:
- a first lens section, comprising a first surface and a second surface,
- said first surface comprising a first plurality of lens surfaces, said first plurality of lens surfaces forming a first plurality of optical axes, said first plurality of lens surfaces having substantially the same size and shape,
- said second surface comprising a second plurality of lens surfaces, said second plurality of lens surfaces forming a second plurality of optical axes, said second plurality of lens surfaces having substantially the same size and shape,
- such that each optical axis of the first plurality of optical axes is aligned with an optical axis of the second plurality of optical axes;
- a second lens section, comprising a third surface and a fourth surface,
- said third surface comprising a third plurality of lens surfaces, said third plurality of lens surfaces forming a third plurality of optical axes, said third plurality of lens surfaces having substantially the same size and shape,
- said fourth surface comprising a fourth plurality of lens surfaces, said fourth plurality of lens surfaces forming a fourth plurality of optical axes, said fourth plurality of lens surfaces having substantially the same size and shape,
- such that each optical axis of the third plurality of optical axes is aligned with an optical axis of the fourth plurality of optical axes;
- a spacer section, having a spacer thickness, comprising a first plurality of holes of circular cross section, said first plurality of holes having a first plurality of axes;
- and
- a stop, having a stop thickness, comprising a second plurality of holes, said second plurality of holes having a second plurality of axes;
- such that each optical axis of the second plurality of optical axes is aligned with an optical axis of the third plurality of optical axes, and each axis of the first plurality of axes is aligned with an optical axis of the third plurality of optical axes, and each axis of the second plurality of axes is aligned with an optical axis of the first plurality of optical axes;
- and
- such that the stop is disposed against the first surface of the first lens section, the second surface of the first lens section is disposed against the first surface of the spacer section, and the second surface of the spacer section is disposed against the first surface of the second lens section.
11 more elements
A lens array comprising:
- a first lens section, comprising a first aspherical surface and a second planar surface,
- said first aspherical surface comprising a first plurality of lens surfaces, said first plurality of lens surfaces forming a first plurality of optical axes normal to the first aspherical surface, said first plurality of lens surfaces having substantially the same size and shape,
- said second planar surface comprising a second plurality of lens surfaces, said second plurality of lens surfaces forming a second plurality of optical axes, said second plurality of lens surfaces having substantially the same size and shape, such that each optical axis of the first plurality of optical axes is aligned with an optical axis of the second plurality of optical axes;
- a second lens section, comprising a third aspherical surface and a fourth aspherical surface,
- said third aspherical surface comprising a third plurality of lens surfaces, said third plurality of lens surfaces forming a third plurality of optical axes, said third plurality of lens surfaces having substantially the same size and shape,
- said fourth aspherical surface comprising a fourth plurality of lens surfaces, said fourth plurality of lens surfaces forming a fourth plurality of optical axes, said fourth plurality of lens surfaces having substantially the same size and shape, such that each optical axis of the third plurality of optical axes is aligned with an optical axis of the fourth plurality of optical axes;
- a spacer section, having a spacer thickness, comprising:
- a first spacer, comprising a first surface, a second surface, and a plurality of holes of a substantially same first diameter, the plurality of holes having a plurality of axes, each axis of which lies on an optical axis of the second plurality of optical axes;
- a second spacer, comprising a first surface, a second surface, and a plurality of holes of a substantially same second diameter, the plurality of holes having a plurality of axes, each axis of which lies on an optical axis of the second plurality of optical axes;
- and
- a third spacer, comprising a first surface, a second surface, and a plurality of holes of a substantially same third diameter, the plurality of holes having a plurality of axes, each axis of which lies on an optical axis of the second plurality of optical axes, where:
- the first surface of the second spacer is disposed against the second surface of the first spacer;
- the first surface of the third spacer is disposed against the second surface of the second spacer;
- and
- the second diameter is smaller than the first diameter, and the third diameter is substantially similar to the first diameter;
- a stop, having a stop thickness, comprising a second plurality of holes, said second plurality of holes having a second plurality of axes;
- such that each optical axis of the second plurality of optical axes is aligned with an optical axis of the third plurality of optical axes, and each axis of the first plurality of axes is aligned with an optical axis of the third plurality of optical axes, and each axis of the second plurality of axes is aligned with an optical axis of the first plurality of optical axes;
- and
- such that the stop is disposed against the first surface of the first lens section, the second surface of the first lens section is disposed against the first surface of the first spacer of the spacer section, and the second surface of the third spacer of the spacer section is disposed against the first surface of the second lens section.
16 more elements
Dependencies are inferred from the claim text.