His father was a professional pharmacist and seller of optical devices.

But the term "power" is also used to express the ability of a lens or other optical device to focus light.

But through the optical device, you see a perfect reproduction of the paintings.

Phantasmagoria is a type of show using an optical device to display moving images.

They might create advanced materials, new electronic and optical devices, or medical equipment.

A nanoprobe as existing in the real world is an optical device.

An image is formed using the normal passband of the optical device.

There was an optical spying device in the room where we were held,.

Similar principles can be used to make other liquid crystal based optical devices.

The demands on these complicated optical devices, of course, are extreme.