to the respective type of standard light. Light fluxes without and with the tested object in the light path are measured by conversion in proportional photocurrents. Photocurrent measured with the tested object in the light path is directly displayed as a percentage of the photocurrent without the...
The utility model provides mist-removing transparent sheets for spectacle lenses. The sheets (1 and 2) are connected with energy conversion devices (3 and 4) attached to spectacle legs, and a switch (6), a chargeable battery (5) and a temperature control switch (7) are arranged on the ...
The exit pupil of the progressive spectacle lens to be measured and the entrance pupil of the hartmann-shack sensor are connected through the 4F system. The conversion relation between detection values obtained through the hartmann-shack sensor and the actual diopter and the actual aberration of ...
The utility model relates to a magnetic elastic spectacle leg comprising a pin head (1), an elastic conversion seat (3) and a spectacle leg (4). The head part (31) of the elastic conversion seat (3) has a hole (311), the middle part of the elastic conversion seat is provided with...