Giles-Archer Colour Perception Unit
Deprecated: mb_convert_encoding(): Handling HTML entities via mbstring is deprecated; use htmlspecialchars, htmlentities, or mb_encode_numericentity/mb_decode_numericentity instead in /var/www/wptbox/wp-content/plugins/wppedia/core/classes/modules/class-cross-link-content.php on line 187
Deprecated: mb_convert_encoding(): Handling HTML entities via mbstring is deprecated; use htmlspecialchars, htmlentities, or mb_encode_numericentity/mb_decode_numericentity instead in /var/www/wptbox/wp-content/plugins/wppedia/core/classes/modules/class-cross-link-content.php on line 187
Deprecated: mb_convert_encoding(): Handling HTML entities via mbstring is deprecated; use htmlspecialchars, htmlentities, or mb_encode_numericentity/mb_decode_numericentity instead in /var/www/wptbox/wp-content/plugins/wppedia/core/classes/modules/class-cross-link-content.php on line 187
A simple, defunct Lantern Test, where a light bulb is shined through a rotary disc carrying six filters (dark red, red, yellow, signal green (cyan), green and clear). A slider behind the disc allows for selection of variable-sized apertures. The subject is sat at 6m away from the lantern in a completely dark room and must be dark adapted before the test. This test was particularly popular with the RAF (UK), which commissioned its own ‘aviation’ model with more colors (Jordinson/Minshall 1959).
