Measuring device

A measuring device comprising:

• a light source that emits light;
• an interference optical system that separates the light that is emitted from the light source into reference light and irradiation light for irradiating an object, the interference optical system causing reflecting light that is produced by reflection of the irradiation light by the object and the reference light to interfere with each other to thereby produce interference light;
• an output fiber that is connected to the interference optical system and that guides the irradiation light;
• an optical element that is connected to the output fiber and that emits the irradiation light;
• a photodetector that detects the interference light;
• a first housing that accommodates the light source and the interference optical system;
• a second housing that accommodates the first housing;
• and
• a processing circuit that controls an operation of the light source and an operation of the photodetector and that processes a signal that is output from the photodetector, the processing circuit being disposed on an outer side of the first housing and on an inner side of the second housing.

A measuring device comprising:

• a light source that emits light;
• an interference optical system that separates the light that is emitted from the light source into reference light and irradiation light for irradiating an object, the interference optical system causing reflecting light that is produced by reflection of the irradiation light by the object and the reference light to interfere with each other to thereby produce interference light;
• an output fiber that is connected to the interference optical system and that guides the irradiation light;
• an optical element that is connected to the output fiber and that emits the irradiation light;
• a first housing that accommodates the light source and the interference optical system;
• and
• a second housing that accommodates the first housing,
• wherein the output fiber is disposed on an inner side of the first housing,
• wherein the optical element is disposed on the inner side of the first housing,
• wherein the first housing includes a first light transmissive window that transmits the irradiation light, and
• wherein the second housing includes a second light transmissive window that transmits the irradiation light.

A measuring device comprising:

• a light source that emits light;
• an interference optical system that includes a splitter that separates the light that is emitted from the light source into reference light and irradiation light for irradiating an object, the interference optical system causing reflecting light that is produced by reflection of the irradiation light by the object and the reference light to interfere with each other to thereby produce interference light;
• an output fiber that is connected to the interference optical system and that guides the irradiation light;
• an optical element that is connected to the output fiber and that emits the irradiation light;
• a first housing that accommodates the light source and the splitter;
• and
• a second housing that accommodates the first housing,
• wherein the output fiber is directly extended from the second housing.