| AU474679B2                (en) |  | Improvements in liquid containing cells such as light valves | 
| AU457866B2                (en) |  | Improvements in or relating to light sensitive materials | 
| YU35681B                (en) |  | Lens with progressively varying refractive index | 
| GB1394870A                (en) |  | Optical waveguides | 
| GB911754A                (en) |  | Ophtalmometer | 
| GB1290521A                (en) |  |  | 
| JPS5277154A                (en) |  | Transparent palstic molded articles | 
| GB1207983A                (en) |  | Remote indicator of the specific gravity of a liquid | 
| GB1059363A                (en) |  | Improvements in and relating to structures such as embankments or dikes | 
| AU1490466A                (en) |  | Improvements in or relating to optical mixing devices | 
| GB1340586A                (en) |  | Optical glass | 
| JPS56137317A                (en) |  | Interference polarizer of multireflection light | 
| GB886051A                (en) |  | Infra-red filter | 
| JPS56137327A                (en) |  | Optical circulator | 
| Ingram et al. |  | Effects of industrial wastes on stream life | 
| GB856617A                (en) |  | Improvements in and relating to indicating the level of ion-exchange material in a container | 
| GB992804A                (en) |  | Colored optical elements | 
| GB982520A                (en) |  | Improvements in optical systems | 
| AU5120164A                (en) |  | Improvements in or relating to the coating of the surfaces of light transparent materials associated with light sources | 
| GB764066A                (en) |  | Improvements in or relating to filters for optical use | 
| GB1259439A                (en) |  |  | 
| JPS51150348A                (en) |  | Light aperture | 
| TOROPOVA |  | Some optical properties of polydispersed media of different composition | 
| AU410106B2                (en) |  | Improvements in or relating to liquid fuel burners | 
| CA670586A                (en) |  | Optical absorption cells |