Correcting lens system for cathode ray tube exposure system
The correcting lens system contains a lens (31) made up of a number of combined block cells (31a). Light from the light source is scattered at an inner surface of a rear wall and emitted. The lens system is designed so that ultraviolet light with a wavelength of less than 300 nm is blocked. An inter...
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| Zusammenfassung: | The correcting lens system contains a lens (31) made up of a number of combined block cells (31a). Light from the light source is scattered at an inner surface of a rear wall and emitted. The lens system is designed so that ultraviolet light with a wavelength of less than 300 nm is blocked. An interruption element (33) mounted on one side opposite the light source blocks ultraviolet light with a wavelength less than 300 nm. The interruption element can be a glass substrate or optical filter element. |
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