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US 7,841,727 B2Granted
Projection optical system having a light blocker
AssigneeHon Hai Precision Industry Co., Ltd.
InventorsMing-Te Lin, Wen-Pin Yeh
Life of this patent
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Abstract
A projection optical system includes a digital micro-mirror device and a light blocker disposed along the light path of the digital micro-mirror device. The digital micro-mirror device includes a base having a plurality of outer pads, a micro-mirror array disposed on the base, and a plurality of bonding wires. The bonding wires are electrically connecting the outer pads with the corresponding micro-mirror array. The light blocker is configured for blocking the light incident to the bonding wires and the light reflected by the bonding wires.
Claims9
A projection optical system, comprising:
- a digital micro-mirror device comprising a base having a plurality of outer pads, a micro-mirror array disposed on the base, and a plurality of bonding wires electrically connecting the outer pads with the corresponding micro-mirror array;
- and
- a light blocker comprising a first L-shaped portion and a second L-shaped portion, the first L-shaped portion and the second L-shaped portion disposed along the light path of the digital micro-mirror device and configured for blocking the light incident to the bonding wires and the light reflected by the bonding wires.
Dependencies are inferred from the claim text.