An optical lens device forms a condenser lens having a first lens of a positive focal length and a second lens of a negative focal length. The first and second lenses are stacked with their optical axis aligned. The first lens has a lens section, edge section and glass member having a linear expansion coefficient smaller than that of the lens section and the edge section to suppress shape change of the first lens due to temperature change of the first lens. The second lens, which is stacked with the first lens, is used for offsetting a change of the positive focal length generated in the first lens when the temperature varies. The glass member having a small linear expansion coefficient suppresses that shape change of the first lens which is not compensated by the second lens.