US 12,449,660 B2Granted

Optical lens assembly and head-mounted electronic device

OwnerPing-Yi Chen, Fei-Hsin Tsai +1inventors

InventorsPing-Yi Chen, Fei-Hsin Tsai, Cong Ge

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Abstract

An optical lens assembly includes: a first element group including: a first lens group with positive refractive power, including one or two lenses; a second element group including: a second lens group with positive refractive power, including two or three lenses; an optical element including, in order from a visual side to an image source side: an absorptive polarizer, a reflective polarizer and a first phase retarder; and a partial-reflective-partial-transmissive element; and a third element group including an image source plane. The first element group, the second element group and the third element group are arranged in order from the visual side to the image source side. When the optical lens assembly satisfies a specific condition, the weight of the device can be reduced, the zoom function can be provided, and the image quality can be ensured.

Claims22

Dependent claims

An optical lens assembly comprising:

a first element group comprising:
a first lens group with positive refractive power, comprising one or two lenses;
a second element group comprising:
a second lens group with positive refractive power, comprising two or three lenses;
an optical element comprising, in order from a visual side to an image source side, an absorptive polarizer, a reflective polarizer and a first phase retarder;
and
a partial-reflective-partial-transmissive element;
and
a third element group comprising an image source plane;
wherein the first element group, the second element group and the third element group are arranged in order from the visual side to the image source side, a focal length of the first lens group is f_G1, a focal length of the second lens group is f_G2, a distance from a visual-side surface of the lens of the first lens group which is closest to the visual side, to an image source-side surface of the lens of the first lens group which is closest to the image source side, along an optical axis is CTG1, a distance from a visual-side surface of the lens of the second lens group which is closest to the visual side, to an image source-side surface of the lens of the second lens group which is closest to the image source side, along the optical axis is CTG2, a distance from the image source-side surface of the lens of the first lens group which is closest to the image source side, to the visual-side surface of the lens of the second lens group which is closest to the visual side, along the optical axis when the optical lens assembly focuses on a near point is T12_N, and the following conditions are satisfied:
0.10<f_G2/f_G1<1.44 and 1.11<(CTG1+CTG2)/T12_N<6.06.

8 more elements

A head-mounted electronic device comprising:

a housing;
an optical lens assembly being disposed in the housing;
an image source being disposed on an image source plane of the optical lens assembly in the housing;
and
a controller being disposed in the housing and electrically connected to the image source;
wherein the optical lens assembly comprising:
a first element group comprising:
a first lens group with positive refractive power, comprising one or two lenses;
a second element group comprising:
a second lens group with positive refractive power, comprising two or three lenses;
an optical element comprising, in order from a visual side to an image source side, an absorptive polarizer, a reflective polarizer and a first phase retarder;
and
a partial-reflective-partial-transmissive element;
and
a third element group comprising the image source plane;
wherein the first element group, the second element group and the third element group are arranged in order from the visual side to the image source side, a focal length of the first lens group is f_G1, a focal length of the second lens group is f_G2, a distance from a visual-side surface of the lens of the first lens group which is closest to the visual side, to an image source-side surface of the lens of the first lens group which is closest to the image source side, along an optical axis is CTG1, a distance from a visual-side surface of the lens of the second lens group which is closest to the visual side, to an image source-side surface of the lens of the second lens group which is closest to the image source side, along the optical axis is CTG2, a distance from the image source-side surface of the lens of the first lens group which is closest to the image source side, to the visual-side surface of the lens of the second lens group which is closest to the visual side, along the optical axis when the optical lens assembly focuses on a near point is T12_N, and the following conditions are satisfied:
0.10<f_G2/f_G1<1.44 and 1.11<(CTG1+CTG2)/T12_N<6.06.

14 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/110,907Filed 17 Feb 2023
Priority: TW 11114578830 Nov 2022
Published: US 2024/0176116 A130 May 2024
Granted: 21 Oct 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G02B 13/009
Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras: having zoom function
G02B 27/0172
Head mounted: characterised by optical features
G02B 9/08
Two + components: arranged about a stop
G02B 13/0035
Having at least one aspherical surface: having three lenses