| 21. | IDC clarity grading is by examination using a 10x achromatic, aplanatic loupe in normal light.
|
| 22. | For example, the " Achromatic " use of a default color scheme in web design.
|
| 23. | The next two images were achromatic.
|
| 24. | Chromostereopsis is usually observed using a target with red and blue bars and an achromatic background.
|
| 25. | Pure achromatic, or " neutral " colors include black, white and all grays.
|
| 26. | In 1830 Holcomb brought an achromatic telescope to Professor Benjamin Silliman at Yale University in New Haven.
|
| 27. | The telescope features an achromatic objective, as well as an adjustable brass cap over the objective.
|
| 28. | It is a refractor with double achromatic lenses of 40 cm diameter and has 5m focal length.
|
| 29. | In spirit of a Wien filter a combined magnetic, electric quadrupole is achromatic around a given velocity.
|
| 30. | The difficulties of fabricating two disks of optical glass required to make a large achromatic lens were formidable.
|
