Light-emitting element module, atomic oscillator, and electronic apparatus
View Patent ↗A light-emitting element module includes: a Peltier device; a light-emitting element that is disposed on the Peltier device; and a package that accommodates the Peltier device and the light-emitting element, the package including a base on which the Peltier device is disposed and a lid joined to the base and. When Ts is external temperature of the package, Tv is temperature of the light-emitting element, Tc 1 is temperature of the base, and Tc 2 is temperature of the lid, Ts<Tc 2 <Tc 1 is satisfied in a case of Tv<Ts.
1. A light-emitting element module comprising:
a Peltier device;
a light-emitting element that is disposed on the Peltier device; and
a package that accommodates the Peltier device and the light-emitting element, the package including a base on which the Peltier device is disposed and a lid joined to the base,
wherein when Ts is external temperature of the package, Tv is temperature of the light-emitting element, Tc 1 is temperature of the base, and Tc 2 is temperature of the lid, Ts<Tc 2 <Tc 1 is satisfied in a case of Tv<Ts,
wherein the lid includes a protrusion portion protruding to an opposite side to the base, and
wherein the lid includes a first portion which supports the protrusion portion, a second portion which is joined to the base and located laterally outward from the first portion in a plan view of the lid, a third portion located laterally outward from the first portion in the plan view which is located between the first potion and the second portion and has a thickness thinner than the first portion, and the second portion is located laterally outward from the third portion in the plan view.
2. The light-emitting element module according to claim 1 ,
wherein the lid includes a window which is disposed in the protrusion portion and through which light from the light-emitting element is transmitted.
3. The light-emitting element module according to claim 1 ,
wherein a thickness of the second portion is thinner than a thickness of the first portion.
4. The light-emitting element module according to claim 1 ,
wherein the pressure of an internal space of the package is lower than an atmospheric pressure.
5. The light-emitting element module according to claim 1 ,
wherein thermal conductivity of a material of the lid is higher than thermal conductivity of a material of the base.
6. An atomic oscillator comprising:
a light-emitting element module comprising:
a Peltier device;
a light-emitting element that is disposed on the Peltier device; and
a package that accommodates the Peltier device and the light-emitting element, the package including a base on which the Peltier device is disposed and a lid joined to the base,
wherein when Ts is external temperature of the package, Tv is temperature of the light-emitting element, Tc 1 is temperature of the base, and Tc 2 is temperature of the lid, Ts<Tc 2 <Tc 1 is satisfied in a case of Tv<Ts,
wherein the lid includes a protrusion portion protruding to an opposite side to the base, and
wherein the lid includes a first portion which supports the protrusion portion, a second portion which is joined to the base and located laterally outward from the first portion in a plan view of the lid, a third portion located laterally outward from the first portion in the plan view which is located between the first potion and the second portion and has a thickness thinner than the first portion, and the second portion is located laterally outward from the third portion in the plan view.
7. The atomic oscillator according to claim 6 , further comprising:
a heat dissipation member that is in contact with at least a part of an outer surface of the lid.
8. An electronic apparatus comprising:
a light-emitting element module comprising:
a Peltier device;
a light-emitting element that is disposed on the Peltier device; and
a package that accommodates the Peltier device and the light-emitting element, the package including a base on which the Peltier device is disposed and a lid joined to the base,
wherein when Ts is external temperature of the package, Tv is temperature of the light-emitting element, Tc 1 is temperature of the base, and Tc 2 is temperature of the lid, Ts<Tc 2 <Tc 1 is satisfied in a case of Tv<Ts,
wherein the lid includes a protrusion portion protruding to an opposite side to the base, and
wherein the lid includes a first portion which supports the protrusion portion, a second portion which is joined to the base and located laterally outward from the first portion in a plan view of the lid, a third portion located laterally outward from the first portion in the plan view which is located between the first potion and the second portion and has a thickness thinner than the first portion, and the second portion is located laterally outward from the third portion in the plan view.