Company, device

the device Roslavtseva
The device Roslavtseva for lighting tables, used in the study of visual acuity.

Rota device - a device to illuminate the tables used in the study of visual acuity (see). Is a rectangular box, on the back of which fortified table. To illuminate the tables in front of them on a little bracket fortified electric lamp, closed the front flap.
The device for lighting tables proposed by A. C. Roslavtseva, used electric incandescent lamp in 40 W (Fig.). The light level of the tables is 600 - 700 LK. Are devices in which as illuminators are two fluorescent lamps.