Lens Device
AssigneesSintai Optical (Shenzhen) Co., Ltd., Asia Optical Co., Inc.
InventorGuo-Quan Lin
Life of this patent
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Abstract
A lens device includes a lens barrel and a plurality of lenses, wherein the lens closest to the objective side is a first lens. The first lens includes a first optical effective portion and a first peripheral portion. The first optical effective portion includes a first surface, an extending surface extending along the optical axis and a second surface connected to the extending surface, the first peripheral portion surrounds the first surface, and a height difference is formed between the first optical effective portion and the first peripheral portion. A junction of the extending surface and an objective-side surface of the first peripheral portion is not in contact with the lens barrel, and a contact surface of the first peripheral portion contacting the lens barrel is not perpendicular to the optical axis.
Claims20
A lens device, comprising:
- A lens barrel;
- and
- a plurality of lenses sequentially fixed in the lens barrel from an objective side to an image side along an optical axis, wherein one of the lenses closest to the objective side is a first lens;
- wherein the first lens comprises a first optical effective portion and a first peripheral portion;
- wherein the first optical effective portion comprises a first surface, an extending surface extending along the optical axis and a second surface connected to the extending surface, the first peripheral portion surrounds the first surface, and a height difference is formed between the first optical effective portion and the first peripheral portion;
- wherein a junction of the extending surface and an objective-side surface of the first peripheral portion is not in contact with the lens barrel, and a contact surface of the first peripheral portion contacting the lens barrel is not perpendicular to the optical axis.
Dependencies are inferred from the claim text.