Focus processing with the distance of different target wheels

A method of establishing a focus setup of an optics system for focusing a miniature digital camera module, comprising:

• a) loading a target holder of a target wheel with a focus target,
• b) selecting a light source,
• c) aligning a test fixture containing a previously focused digital camera module (PFM) with an optic center line,
• d) selecting said target holder to be over said optic center line,
• e) adjusting said target wheel distance from said PFM,
• f) adjusting a field lens to focus an image of said focus target onto a lens opening in said PFM,
• g) verifying adjustment of said target wheel and said field lens,
• h) repeating steps e) through g) until said adjustment is acceptable,
• i) recording said adjustment for use in focusing digital camera modules.

A method of focusing a miniature digital camera module, comprising:

• a) selecting a light source,
• b) selecting a focus target,
• c) setting target distances,
• d) loading a digital camera module under test (MUT) into a test fixture,
• e) aligning said test fixture to an optic centerline,
• f) adjusting a focus setting of said MUT,
• g) rejecting said MUT that cannot be focused and unloading from said test fixture,
• h) testing said MUT that can be focused,
• i) unloading a tested MUT from said test fixture,
• j) repeating steps a) through i) until a last MUT is focused and tested,
• k) fixing the focus setting of said MUT.