1. Of or relating to sight; visual: an optical defect.
2. Designed to assist sight: optical instruments.
3. Of or relating to optics.
4. Relating to or using visible light: optical astronomy.
5. Using light-sensitive devices.
sight
optics deals with the behavior of light and optical deals with sight and the interaction of visible light
Optical drive
"Optical" means related to light, often to visible light. So, a system that works with light.
It depends what kind of optical devices you mean, For instance Meiji Techno manufactures microscopes.
Target Identification System, Electro-Optical.
Optical power refers to the ability of a lens or optical system to converge or diverge light. It is typically measured in diopters (D) and indicates the strength of the lens in focusing light onto the retina. Positive optical power converges light (useful for correcting hyperopia), while negative optical power diverges light (useful for correcting myopia).
Optical density is a measurement of how much light is absorbed or transmitted by a material. It is often used to quantify the amount of a substance in a solution by measuring the absorbance of light passing through it. A higher optical density indicates more absorption of light.
Japan Optical Company
In OP art OP means Optical Illusion.
It could mean: RAM Optical Instrument Rules of Interaction (Gaming) Read Only Information
Optical signals (usually on the infrared band) optical s ignals generally mean visible light... so it mainly uses visible light.