| 摘要 |
A lighting device in a controlled distribution type provides a high energy efficiency and desired distribution of light. Such lighting device is obtained by redirecting and condensing the flux of a lamp 1 with an ellipsoidal reflector 2 alone or together with a spheric reflector 3, further redirecting visible or infrared rays in the flux to have visible rays entered to a transparent diffuser which embodies a plurality of ridges or ridges and grooves and diffuses incident light in single axis and further controlling such diffused rays with a reflector or a set of reflectors 6. Such lighting device is used to constituto another lighting device in a radiation panel type. |
