Optical system and projection device

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12181646
APP PUB NO 20220221698A1
SERIAL NO

17518812

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The present application provides an optical system and a projection device. The optical system includes a display unit, a first lens group, a second lens group and a reflector which are sequentially arranged along a light transmission direction. The first lens group has a positive focal power, the second lens group has a negative focal power, a total of focal powers of the second lens group and the reflector is positive. A distance from a side of the first lens group close to the display unit to another side of the second lens group far away from the display unit is T0, a distance from the side of the second lens group far away from the display unit to the reflector is T, and T0/T is greater than or equal to 0.8 and less than or equal to 1.1. The optical system provided by the present application is small in size and portable.

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Patent Owner(s)

Patent OwnerAddress
UNION OPTECH CO LTDNO 10 YIWEI ROAD TORCH DEVELOPMENT ZONE ZHONGSHAN CITY GUANGDONG PROVINCE 528400 ZHONGSHAN CITY GUANGDONG PROVINCE 528400

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gong, Junqiang Zhongshan, CN 19 25
Li, Shoulin Zhongshan, CN 3 3
Quan, Liwei Zhongshan, CN 6 2
Wang, Hao Zhongshan, CN 906 6386

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