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Turville Infinity Balance and General Subjective Unit
TEST CHARTS
illuminated test chart
Raphael's Ltd
Europe: United Kingdom, England, London
1930s
metal; plastic
approx.: 1490 mm
2003.458
TEST CHARTS
illuminated test chart
Raphael's Ltd
Europe: United Kingdom, England, London
1930s
metal; plastic
approx.: 1490 mm
Large floor-standing piece of practice equipment incorporating three revolving block and 'V' astigmatism charts, test chart holder with changeable chart plates stored to the side, revolving letter drum chart beneath and muscle spotlight with associated drop-cell below that, swing-across deep suppression integer box, removable hand-held integer lighting control and three adjustable lighting arms. Power unit to left. Black crackled enamel finish. Plain metal stand with round base.
2003.458
Gift of Mr Jan Kopernicki, 2003