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US 2024/0286948 A1Published application
Athermal glasses and athermal systems for infrared optics
AssigneeSchott AG
InventorMark J. Davis
Life of this patent
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Abstract
Athermal glasses and athermal systems for infrared optical components and systems are disclosed.
Claims7
An optical lens system, the system comprising:
- one or more lenses,
- wherein at least one of the one or more lenses comprises a chalcogenide glass composition,
- wherein the chalcogenide glass composition has a figure-of-merit (FOM) calculated as:
- FOM
- =
- (
- 1
- n
- g
- -
- n
- m
- )
- [
- dn
- g
- dT
- -
- n
- g
- n
- m
-
- dn
- m
- dT
- ]
- -
- α
- where α is a linear thermal expansion of the lens comprising the chalcogenide glass composition,
- T is a temperature,
- ng is a refractive index of the lens, and
- nm is a refractive index of the surrounding medium, and
- wherein
- -
- (
- FOM
- )
- ≥
- 30
-
- ppm
- °
-
- C
- .
- .
44 more elements
A system, the system comprising:
- a laser gain media having a chalcogenide glass composition,
- wherein the chalcogenide glass composition is represented by:
- y As+(100−y)[x S+(100−x)Se]
- wherein 10≤y≤40, and 0≤x≤100 in atomic %,
- wherein the chalcogenide glass composition has a figure-of-merit (FOM) calculated as:
- FOM
- =
- α
- +
- 1
- n
-
- dn
- a
-
- b
-
- s
- dT
- where α is a linear thermal expansion of the laser gain media,
- T is a temperature,
- n is a refractive index, and
- nabs is an absolute change in refractive index with respect to the temperature, and
- wherein
- ❘
- "\[LeftBracketingBar]"
- FOM
- ❘
- "\[RightBracketingBar]"
- ≤
- 5
-
- ppm
- °
-
- C
- .
- .
35 more elements
Dependencies are inferred from the claim text.