Granted Patent B2

US 12,736,784 · App. 18/591,154 · Granted Sep 15, 2026

Inventors: Chi-Wei Chi (Taichung City, TW); Chen-Wei Fan (Taichung City, TW); Wei-Fong Hong (Taichung City, TW); Ming-Ta Chou (Taichung City, TW)

Assignee: LARGAN PRECISION CO., LTD.

G02B13/0055

Abstract

Claims (188)

1 . An imaging lens assembly, comprising:

an optical element, comprising:

a substrate, wherein the substrate is made of transparent material;

a nanostructure layer disposed on a surface of the substrate, wherein a main component of the nanostructure layer is an aluminum oxide, the nanostructure layer has a plurality of ridge-like protrusions which extend non-directionally, a bottom of each of the ridge-like protrusions is closer to the substrate than a top of each of the ridge-like protrusions to the substrate, and each of the ridge-like protrusions is gradually tapered from the bottom to the top; and

an intermediate layer disposed between the substrate and the nanostructure layer, wherein the intermediate layer comprises:

a first film, wherein a main component of the first film is a silicon dioxide; and

a plurality of second films, wherein a main component of each of the second films is the silicon dioxide, and the second films are stacked with the first film;

wherein a thickness of the first film is Tf1, a thickness of each of the second films is Tf2, a thickness of the intermediate layer is Ti, and the following conditions are satisfied:

Tf

⁢

2

<

Tf

⁢

1

;

45

⁢

nm

<

Tf

⁢

1

<

180

⁢

nm

;

and

101

⁢

nm

<

Ti

<

450

⁢

nm

.

2 . The imaging lens assembly of claim 1 , wherein the thickness of the first film is Tf1, and the following condition is satisfied:

50

⁢

nm

<

Tf

⁢

1

<

120

⁢

nm

.

3 . The imaging lens assembly of claim 1 , wherein the thickness of the first film is Tf1, the thickness of each of the second films is Tf2, and the following condition is satisfied:

1

.

3

<

Tf

⁢

1

/

Tf

⁢

2

<

5

⁢

5

.

4 . The imaging lens assembly of claim 1 , wherein the thickness of the intermediate layer is Ti, and the following condition is satisfied:

110

⁢

nm

<

Ti

<

330

⁢

nm

.

5 . The imaging lens assembly of claim 1 , wherein an average reflectivity of the optical element corresponding to a light with a wavelength from 450 nm to 600 nm is R0, and the following condition is satisfied:

R 0<0.65%.

6 . The imaging lens assembly of claim 5 , wherein the average reflectivity of the optical element corresponding to the light with the wavelength from 450 nm to 600 nm is R0, an average reflectivity of the optical element corresponding to the light with the wavelength from 450 nm to 600 nm after the optical element is placed in an environment with a temperature of 85° C. and a relative humidity of 85% for 1000 hours is R1000, and the following condition is satisfied:

1.05

<

R

⁢

1000

/

R

⁢

0

<

1

⁢

5

.

7 . The imaging lens assembly of claim 1 , wherein the bottom of each of the ridge-like protrusions is physically contacted with the intermediate layer, and a main component of the ridge-like protrusions is different from a main component of the intermediate layer.

8 . The imaging lens assembly of claim 7 , wherein a partial area of a top portion of the intermediate layer is contacted with an air.

9 . The imaging lens assembly of claim 1 , wherein an average structural height of the nanostructure layer is Havg, and the following condition is satisfied:

70

⁢

nm

<

Havg

<

350

⁢

nm

.

10 . The imaging lens assembly of claim 1 , wherein the optical element is a lens element, and the imaging lens assembly further comprises:

a lens element set, wherein the optical element is closer to an object-side end or an image-side end than the lens element set to the object-side end or the image-side end.

11 . The imaging lens assembly of claim 10 , further comprising:

a light path folding element, wherein the optical element is closer to the light path folding element than the lens element set to the light path folding element.

12 . The imaging lens assembly of claim 10 , wherein the substrate of the optical element comprises:

an optical effective portion having refractive power; and

a peripheral portion disposed around the optical effective portion;

wherein a thickness of the intermediate layer corresponding to the optical effective portion is larger than a thickness of the intermediate layer corresponding to the peripheral portion.

13 . An electronic device, comprising:

the imaging lens assembly of claim 1 .

14 . An imaging lens assembly, comprising:

an optical element, comprising:

a substrate, wherein the substrate is made of transparent material;

a nanostructure layer disposed on a surface of the substrate, wherein a main component of the nanostructure layer is an aluminum oxide, the nanostructure layer has a plurality of ridge-like protrusions which extend non-directionally, a bottom of each of the ridge-like protrusions is closer to the substrate than a top of each of the ridge-like protrusions to the substrate, and each of the ridge-like protrusions is gradually tapered from the bottom to the top; and

an intermediate layer disposed between the substrate and the nanostructure layer, wherein the intermediate layer comprises:

a plurality of films, wherein a main component of each of the films is a silicon dioxide, and the films are stacked adjacent to each other;

wherein a thickness of the intermediate layer is Ti, and the following condition is satisfied:

101

⁢

nm

<

Ti

<

450

⁢

nm

.

15 . The imaging lens assembly of claim 14 , wherein an average reflectivity of the optical element corresponding to a light with a wavelength from 450 nm to 600 nm is R0, and the following condition is satisfied:

R 0<0.65%.

16 . The imaging lens assembly of claim 15 , wherein the average reflectivity of the optical element corresponding to the light with the wavelength from 450 nm to 600 nm is R0, an average reflectivity of the optical element corresponding to the light with the wavelength from 450 nm to 600 nm after the optical element is placed in an environment with a temperature of 85° C. and a relative humidity of 85% for 1000 hours is R1000, and the following condition is satisfied:

1.05

<

R

⁢

1000

/

R

⁢

0

<

1

⁢

5

.

17 . The imaging lens assembly of claim 14 , wherein the thickness of the intermediate layer is Ti, and the following condition is satisfied:

110

⁢

nm

<

Ti

<

330

⁢

nm

.

18 . The imaging lens assembly of claim 14 , wherein the bottom of each of the ridge-like protrusions is physically contacted with the intermediate layer, and a main component of the ridge-like protrusions is different from a main component of the intermediate layer.

19 . The imaging lens assembly of claim 18 , wherein a partial area of a top portion of the intermediate layer is contacted with an air.

20 . The imaging lens assembly of claim 14 , wherein an average structural height of the nanostructure layer is Havg, and the following condition is satisfied:

70

⁢

nm

<

Havg

<

350

⁢

nm

.

21 . The imaging lens assembly of claim 14 , wherein the optical element is a lens element, and the imaging lens assembly further comprises:

a lens element set, wherein the optical element is closer to an object-side end or an image-side end than the lens element set to the object-side end or the image-side end.

22 . The imaging lens assembly of claim 21 , further comprising:

a light path folding element, wherein the optical element is closer to the light path folding element than the lens element set to the light path folding element.

23 . The imaging lens assembly of claim 21 , wherein the substrate of the optical element comprises:

an optical effective portion having refractive power; and

a peripheral portion disposed around the optical effective portion;

wherein a thickness of the intermediate layer corresponding to the optical effective portion is larger than a thickness of the intermediate layer corresponding to the peripheral portion.

24 . An electronic device, comprising:

the imaging lens assembly of claim 14 .

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (12)