The Achromatic Lens

2017 ◽  
Author(s):  
D.J. Lovell
Keyword(s):  
2010 ◽  
Vol 18 (3) ◽  
pp. 50-52 ◽  
Author(s):  
Michael W. Davidson

Giovanni Amici was an Italian microscopist, astronomer, optical instrument designer, and botanist who is best known as the achromatic lens inventor. He also designed reflecting telescopes and introduced a lens for the inspection of an objective's rear focal plane, termed the Amici-Bertrand lens. Aditionally, in 1850 he invented the water immersion lens.


2018 ◽  
Vol 47 (4) ◽  
pp. 422001
Author(s):  
许忠保 XU Zhong-bao ◽  
陶伟森 TAO Wei-sen ◽  
王双迎 WANG Shuang-ying ◽  
陈威 CHEN Wei ◽  
宋丛珊 SONG Cong-shan ◽  
...  

2019 ◽  
Vol 13 (2) ◽  
pp. 72-72
Author(s):  
Noriaki Horiuchi
Keyword(s):  

Joseph Lister was born at Upton in Essex on April 5, 1827, and like many other men who have attained great eminence, belonged to a Quaker family. His father, Joseph Jackson Lister, who was in business in London, occupied his leisure time in scientific researches, more especially in researches in connection with the perfection of the microscope; indeed, it is to his researches that we owe the final perfection of the achromatic lens, which has proved such an essential instrument for microscopical work. He was a man of great accuracy of thought, and a hard worker, and his influence on Lord Lister's character and career was very profound; indeed, Lord Lister himself was never weary of stating how much he owed to his father's early training. It may be noted, in passing, that his father was himself a Fellow of the Royal Society, and that his brother and one of his nephews have also received that honour. Lister's medical training commenced at University College, and while there he came under the influence of Sharpey, who was then Professor of Physiology, and of Thomas Graham, who was Professor of Chemistry. Sharpey especially exercised great influence in directing his thoughts to the study of Physiological problems, which ultimately formed the basis of his great life work; indeed, while still a student he made observations on the contractile tissue of the iris which attracted a considerable amount of attention among physiologists, both in this country and abroad, and he followed that up by work on the muscular tissue of the skin. Both these papers were published in the 'Quarterly Journal of Microscopical Science,' in 1853.


1834 ◽  
Vol 124 ◽  
pp. 199-203

When the application of any optical or other arrangement is found to be useful, a correct statement of the manner in which it became so is essentially requisite, in order that each person who may have had a share in bringing it forward may have his due proportion of the merit. The achromatic lens which I have applied to the wired micrometer, and which has been found to produce such very considerable advantages to that instrument, arose out of a trial that was made at the suggestion of Professor Barlow, for the purpose of improving the chromatic aberrations which affected the field of the eye-glasses ap­plied to the telescope invented by that gentleman with a fluid correcting lens, and made by myself for the Royal Society.


2007 ◽  
Vol 85 (1) ◽  
pp. 1-12 ◽  
Author(s):  
E J Prime ◽  
J A Behr ◽  
M R Pearson

A useful tool that can achieve a high level of spin polarization is a circularly polarized far off-resonance dipole force trap (CFORT). This work is the first step in its development; building the necessary components to successfully load stable 39K into a linearly polarized far off-resonance trap (FORT) from a magneto-optical trap, where the atoms are precooled to a temperature of 400 μK. The FORT consists of 700 mW of light from a titanium–sapphire ring laser, focused with a 200 mm achromatic lens to a waist of 35 μm. The light is detuned between 1 and 20 nm to the red of the D1 transition and this gives rise to trap depths in the region of a few milliKelvin. A characterization of the FORT's loading efficiency and lifetime as a function of FORT beam detuning, power, and ellipticity are studied. PACS Nos.: 32.80.Pj, 23.40.–s, 39.25.+k


1998 ◽  
Vol 5 (6) ◽  
pp. 334-339 ◽  
Author(s):  
Yasuhiro Tanaka ◽  
Michihiro Yamagata ◽  
Tomohiko Sasano

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