- 1Of or relating to sight, especially in relation to the physical action of light: optical illusionsMore example sentences
- Radio astronomy is a young field relative to optical astronomy.
- Hooper declared at the outset of his book that optical toys could hone visual perception and, consequently, prime social vigilance.
- The new system should help remove the optical trickery that occurs when assistant referees fail to position themselves correctly on the sidelines.
- 1.1Constructed to assist sight.More example sentences
- For some, the use of optical aids compromises genius, and art with it.
- Counting how many Pleiads you can see without optical aid is a good test of both your vision and observing conditions; most people see 6 or 7.
- Normally, when Christine and I do any serious bird watching, it is with the Core Team and their plethora of optical aids and identification tomes.
- 1.2Devised on the principles of optics.More example sentences
- An optical lattice is a light grid created by the interference of two or more laser beams.
- The forward periscope is replaced by a passive optical periscope for night-time manoeuvres.
- Created with a rear-screen optical printer and mattes cut out of construction paper, A Man Whose Life Was Full of Woe has a rough, ecstatic collage quality.
- 2 Physics Operating in or employing the visible part of the electromagnetic spectrum: optical telescopesMore example sentences
- Of course, the capabilities of optical and infrared telescopes also continued to improve.
- The paper shows that positrons can see defects better than either optical or electron beam microscopes.
- Whether the telescope is operating as an optical or an infrared instrument, rarely will there be an astronomer peering through an eyepiece at the Keck's images.
- 2.1 Electronics (Of a device) requiring electromagnetic radiation for its operation: integrated optical circuitsMore example sentences
- Here's a look at how test sequencers can speed up tests on optical devices, saving time and money.
- Available optical devices such as CDs and DVDs record information on the surface of the disc.
- Such a device might one day become the CPU of an optical computer.
- More example sentences
- But hand recounts of optically scanned ballots will go a long way toward addressing doubts about that technology and about the vendor.
- To illustrate, let us consider a ray of light passing through a cube of optically denser material.
- The parabolic reflectors focus their respective wavelengths onto mechanical devices that act like shutters to optically modulate the beams.
More definitions of opticalDefinition of optical in:
- The British & World English dictionary