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US 12,736,779 B2Granted
Imaging lens system
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorKyu Min Chae
Life of this patent
Estimating the term…
Abstract
An imaging lens system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, sequentially arranged from an object side. Each of the second lens and the third lens has a positive refractive power. The imaging lens system satisfies conditional expression: |L3DTn|<10.0 [10−6/° C.], where L3DTn is a change rate in refractive index according to a change in temperature of the third lens.
Claims19
An imaging lens system comprising:
- a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, sequentially arranged from an object side,
- wherein each of the second lens and the third lens has a positive refractive power,
- wherein the imaging lens system satisfies conditional expressions:
- ❘
- "\[LeftBracketingBar]"
- L
-
- 3
-
- DTn
- ❘
- "\[RightBracketingBar]"
- <
- 10.
- [
- 10
- -
- 6
- /
- °
-
- C
- .
- ]
-
- and
- 0.42
- <
- L
-
- 1
-
- DTn
- /
- L
-
- 3
-
- DTn
- <
- 0.52
- ,
- where L1DTn is a change rate in refractive index according to a change in temperature of the first lens, and L3DTn is a change rate in refractive index according to a change in temperature of the third lens.
40 more elements
An imaging lens system comprising:
- a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, sequentially arranged from an object side,
- wherein the second lens has a convex image-side surface,
- wherein the imaging lens system satisfies conditional expressions:
- 1.16
- <
- f
-
- 3
- /
- f
- <
- 1.26
- and
- 0.42
- <
- L
-
- 1
-
- DTn
- /
- L
-
- 3
-
- DTn
- <
- 0.52
- ,
- and 0.42<L1DTn/L3DTn<0.52,
- where f is a focal length of the imaging lens system, and f3 is a focal length of the third lens, L1DTn is a change rate in refractive index according to a change in temperature of the first lens, and L3DTn is a change rate in refractive index according to a change in temperature of the third lens.
28 more elements
An imaging lens system comprising:
- a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, sequentially arranged from an object side,
- wherein a material of the first to third lenses is different from a material of the fourth to eighth lenses,
- wherein each of the second lens and the third lens has a positive refractive power,
- wherein the imaging lens system satisfies conditional expressions:
- ❘
- "\[LeftBracketingBar]"
- L
-
- 3
-
- DTn
- ❘
- "\[RightBracketingBar]"
- <
- 10.
- [
- 10
- -
- 6
- /
- °
-
- C
- .
- ]
-
- and
- 0.42
- <
- L
-
- 1
-
- DTn
- /
- L
-
- 3
-
- DTn
- <
- 0.52
- ,
- and 0.42<L1DTn/L3DTn<0.52
- where L1DTn is a change rate in refractive index according to a change in temperature of the first lens, and L3DTn is a change rate in refractive index according to a change in temperature of the third lens.
42 more elements
Dependencies are inferred from the claim text.