Projection lens and projection device

A projection lens that is mounted on a housing of a projection device including an electro-optical element, the projection lens comprising:

• a first holding part that holds a first optical system disposed along a first optical axis along which light emitted from the housing passes;
• a first reflective part that bends light parallel to the first optical axis to form light parallel to a second optical axis;
• a second reflective part that bends the light parallel to the second optical axis to form light parallel to a third optical axis;
• and
• a second holding part that holds the first reflective part and the second reflective part,
• wherein a distance along the first optical axis between a first lens, which is disposed to be closest to a reduction side in the first optical system, and the first reflective part is longer than a distance along the second optical axis between the first reflective part and the second reflective part,
• the first lens is a lens made of glass,
• the first optical system includes an aspherical third lens that is made of a resin material and is disposed between the first lens and the first reflective part, and
• wherein a diameter of an optical surface of the third lens is 1.3 to 2 times a diameter of an optical surface of the first lens.

A projection lens that is mounted on a housing of a projection device including an electro-optical element, the projection lens comprising:

• a first holding part that holds a first optical system disposed along a first optical axis along which light emitted from the housing passes;
• a first reflective part that bends light parallel to the first optical axis to form light parallel to a second optical axis;
• a second reflective part that bends the light parallel to the second optical axis to form light parallel to a third optical axis;
• and
• a second holding part that holds the first reflective part and the second reflective part,
• wherein a distance along the first optical axis between a first lens, which is disposed to be closest to a reduction side in the first optical system, and the first reflective part is longer than a distance along the second optical axis between the first reflective part and the second reflective part,
• the first lens is a lens made of glass,
• the first optical system includes an aspherical third lens that is made of a resin material and is disposed between the first lens and the first reflective part, and
• wherein |1/f3| is 0.03 or less in a case where a focal length of the third lens is denoted by f3.

A projection lens that is mounted on a housing of a projection device including an electro-optical element, the projection lens comprising:

• a first holding part that holds a first optical system disposed along a first optical axis along which light emitted from the housing passes;
• a first reflective part that bends light parallel to the first optical axis to form light parallel to a second optical axis;
• a second reflective part that bends the light parallel to the second optical axis to form light parallel to a third optical axis;
• and
• a second holding part that holds the first reflective part and the second reflective part,
• wherein a distance along the first optical axis between a first lens, which is disposed to be closest to a reduction side in the first optical system, and the first reflective part is longer than a distance along the second optical axis between the first reflective part and the second reflective part,
• the first lens is a lens made of glass,
• the first optical system includes an aspherical third lens that is made of a resin material and is disposed between the first lens and the first reflective part, and
• wherein the first optical system includes a stop portion that is disposed between the first lens and the third lens, and
• a distance between the stop portion and the third lens is longer than a distance between the stop portion and the first lens.