Patent ID: 7649699

Claim:
A cemented lens comprising a first optical element, a second optical element, and a third optical element respectively formed by different solid materials, said third optical element and said first optical element being cemented to each other, and said first optical element and said second optical element being cemented to each other, wherein both an incident surface and an exit surface of said first optical element and said second optical element are refracting surfaces, and the following conditional expressions are satisfied: |Δθ gF 1|>0.0272 |Δθ gF 2|>0.0272 Δθ gF 1×Δθ gF 2<0 φ1×φ2<0 where ΔθgF 1 and ΔθgF 2 are respectively anomalous dispersion characteristics of the materials for said first optical element and said second optical element with respect to a g line and an F line, and φ 1 and φ 2 are respectively refracting powers of said first optical element and said second optical element when both the incident surface and the exit surface of said first optical element and said second optical element are surfaces in contact with air.