Humphrey calibration laboratory set

[Chioma]

Can anybody tell me what this instrument is. I cannot seem to find the description on google. it says Humphrey calibration laboratory.

Thanks in advance!

[braheem24]

Going by name only it sounds like a kit for calibration of humphrey/zeiss equipment. If so, Humphrey does not generally sell service items to end users or independent repair facilities.

[Barry Santini]

The smaller lenses were interfermetrically-calibrated test lenses that were used at least for the old Humphrey Lens Analyzers. During calibration, the instrument would prompt the technician for the apororiately numbered lens, whose dioptric powers varies across the range of the instrument. The software would then plot and compare found values against known, and apply a kind of Monte-Carlo statistical redistribution in calculating the geometric slope of the instrument's dioptric calibration, enhancing the instrument's optical tolerance from 0.12D to a factor of 2-3x better.

Of course, dust and dirt, waves and operator error could still impacts results.

B