Calibration method for transmittance of optical lens

A calibration method for transmittance of optical lens, comprising:

• deploying a series of flats on a spherical surface of a hemispherical coating fixture and performing coating by using a same process as a target lens;
• measuring a transmittance, corresponding to a target incident angle, of a coated surface of each of the series of flats at a same target edge position;
• wherein the target edge position is an edge position for clamping reserved by a clear aperture of the target lens for a matching coating fixture, and an edge position of each flat clamped by the hemispherical coating fixture is consistent with the edge position of the target lens clamped by the matching coating fixture;
• obtaining a two-dimensional curve, corresponding to the target incident angle, of an included angle between a first connection line and a second connection line gradually changes with the transmittance in a gradient change process by fitting based on a measured edge transmittance of each flat and coordinate information on the hemispherical coating fixture;
• wherein the first connection line is a connection line between any coordinate point on the spherical surface and a spherical center of the hemispherical coating fixture, and the second connection line is a connection line between a vertex of the spherical surface and the spherical center of the hemispherical coating fixture;
• also, different target incident angles correspond to different two-dimensional curves;
• and
• saving the two-dimensional curve as a reference standard of improving or verifying an edge transmittance of the target lens for future recall.