An exposure apparatus includes a light source a range gauge, which refracts the light emitted from the light source at a fixed angle and a filter gauge that projects the light passing through the range gauge in different amounts to the circumference and center of the panel. The exposure further...http://www.google.com.au/patents/US5742864?utm_source=gb-gplus-sharePatent US5742864 - Exposure apparatus for use in the manufacture of color CRTs
