achromatic

However, it is well known that he was not the first to make achromatic lenses.

With the achromatic refractor, however, this is not the case.

In the absence of light, perception is achromatic and ultimately, black.

Its bill is also achromatic, but tan near the bottom of the lower jaw.

And a combined quadrupole can be achromatic around a given energy.

Later on he was instrumental in the invention of the achromatic telescope.

All that existed in the physical world were varying achromatic wavelengths of light.

Had he done so, he would almost certainly have invented the achromatic lens.

His major achievement at the time was the improvement of the achromatic microscope objective.

In 1765, he introduced an astronomical instrument fitted with two achromatic lenses.

To these achromatic object glasses, as they are called, the great development of astronomical knowledge, since Newton's time, is due.

In practice, the lens will be an achromatic doublet.

For complements of trees, the achromatic number can be computed in polynomial time.

George Bass was an optician known to have made an achromatic doublet around 1733.

For an achromatic dispersive lens the converse must be adopted.

Later achromatic refractor objectives had four surfaces that have to be figured).

The most common type is an achromatic doublet, with elements made of crown and flint glass.

This was especially true in refracting telescopes, before the invention of achromatic objective lenses.

Achromatic lenses are corrected to bring two wavelengths (typically red and blue) into focus in the same plane.

The achromatic channel is responsible for luminance, or white-black detection.

An achromatic lens focused an 8mm-wide, slightly converging light beam.

John Dollond was the first person to patent the achromatic doublet.

Any color that lacks strong chromatic content is said to be unsaturated, achromatic, or near neutral.

However, the dispersion must be corrected by other components of the lens system if it is to be achromatic.

The next two images were achromatic.