TECHNICAL FIELD

The present invention relates to a light source device, and a projector and a lighting device using the same.

BACKGROUND ART

In the technical field to which the present invention belongs, there has been proposed a light source device configured to convert excitation light emitted from a solid state light source into visible light by using a phosphor so as to efficiently emit light. As one of examples, Patent Literature 1 discloses “a light source device comprises: a wavelength conversion member having a base which is rotatable about a predetermined rotation axis and a phosphor layer including a phosphor and provided on the base; a light source; a converging optical system configured to irradiate excitation light emitted from the light source so as to converge the excitation light on the phosphor layer; and a casing in which a sealed space for accommodating the wavelength conversion member is formed to be isolated from the outside (excerpted from Abstract)”.

CITATION LIST

Patent Literature

Patent Literature: JP 2012-18762 A

SUMMARY OF INVENTION

Technical Problem

Since high temperature heat is generated when the excitation light is converted into fluorescence light on the phosphor layer, there is a demand to suppress increase in the temperature in the casing. With this regard, in the optical device described in Patent Literature 1, the casing accommodates the wavelength conversion member and the light source, and accordingly, there is a problem that in addition to the heat generated from the wavelength conversion member, the heat generated from the light source is further accumulated in the casing.

Furthermore, since the casing accommodates the wavelength conversion member and the light source, it increases in size and a unit formed by the casing which accommodates the wavelength conversion member and the light source becomes expensive. Accordingly, when either the wavelength conversion member or the light source malfunctions and is replaced by unit, there is a problem that the maintenance cost becomes expensive.

The present invention has been made in view of the problems mentioned above, and an objective thereof is to provide an optical device, a projector, and a lighting device configured to effectively process heat emitted from a wavelength conversion member.

Solution to Problem

In order to solve the problems above, the present invention is configured as described in the claims. According to one example of the present invention, a light source device comprising: an excitation light source configured to generate excitation light; a wavelength conversion member including a base and a phosphor layer which is provided on the base and configured to convert the excitation light into fluorescence; and a converging optical system including a converging lens for converging the excitation light on the phosphor layer, wherein the light source device further comprises a housing for accommodating the wavelength conversion member, the excitation light source is provided outside the housing, a first wall surface of the housing includes a lens hole into which the converging lens is inserted, and the converging lens which is inserted into the lens hole and a wall surface of the housing isolate an internal space of the housing from an outer space of the housing.

Advantageous Effects of Invention

According to the present invention, it is possible to provide an optical device, a projector, and a lighting device configured to effectively process heat emitted from a wavelength conversion member. The purposes, configurations, and advantageous effects of the present invention other than those described above will be clarified in the following description of the embodiments.

