Patent ID: 7593104

Claim:
An apparatus for evaluating an optical module, the optical module including a light emitting element and a supporting member by which relative positions of the light emitting element and the supporting member are evaluated, the apparatus comprising: an optical fiber for evaluation having one end supported by the supporting member of the optical module; a photodetector that is provided at the other end of the optical fiber for evaluation and detects the amount of only a portion of components of light including an optical axis thereof emitted from the light emitting element; and a diaphragm member provided between the light emitting element and the photodetector that transmits only a portion of components of light including an optical axis thereof emitted from the light emitting element; wherein the optical fiber for evaluation has a first optical fiber for evaluation having one end supported by the supporting member and a second optical fiber for evaluation that is optically coupled with the other end of the first optical fiber for evaluation; and wherein the diaphragm member is provided between the first optical fiber for evaluation and the second optical fiber for evaluation.