Define
Focal length describes the optical power of a lens.
Optical assemblies
An optical assembly combines geometry, alignment and the properties of its materials.
Prepare
Aperture limits the bundle of light entering a system.
Observe
Alignment changes should be recorded consistently.
Review
Reflections depend on angle and surface treatment.
Choose a stage to read its working note.
Illustrative reference data, not live measurements.
01 / Definition
Focal length describes the optical power of a lens.
02 / Method
Aperture limits the bundle of light entering a system.
03 / Observation
Alignment changes should be recorded consistently.
04 / Interpretation
Reflections depend on angle and surface treatment.