Technological progress of a ferrofluid deformable mirror with tunable nominal optical power for high-contrast imaging

2015 ◽  
Author(s):  
Aaron J. Lemmer ◽  
Tyler D. Groff ◽  
N. Jeremy Kasdin ◽  
Daniel Echeverri ◽  
Isabel R. Cleff
Keyword(s):  
Technological Progress ◽  
Optical Power ◽  
Deformable Mirror ◽  
High Contrast ◽  
Contrast Imaging ◽  
High Contrast Imaging

Feasible optimal deformable mirror shaping algorithm for high-contrast imaging

2003 ◽  
Author(s):  
Amir Give'on ◽  
N. Jeremy Kasdin ◽  
Robert J. Vanderbei ◽  
David N. Spergel ◽  
Michael G. Littman ◽  
...  
Keyword(s):  
Deformable Mirror ◽  
High Contrast ◽  
Contrast Imaging ◽  
High Contrast Imaging

Performance of a precision high-density deformable mirror for extremely high contrast imaging astronomy from space

2003 ◽  
Author(s):  
John T. Trauger ◽  
Dwight Moody ◽  
Brian Gordon ◽  
Yekta Gursel ◽  
Mark A. Ealey ◽  
...  
Keyword(s):  
High Density ◽  
Deformable Mirror ◽  
High Contrast ◽  
Contrast Imaging ◽  
High Contrast Imaging

The CM120 Biotwin: a high-contrast objective lens, optimum cryo-vacuum and improved EDX performance

1995 ◽  
Vol 53 ◽  
pp. 584-585
Author(s):  
Uwe Lücken ◽  
Michael Felsmann ◽  
Wim M. Busing ◽  
Frank de Jong
Keyword(s):  
Life Science ◽  
Focal Length ◽  
Objective Lens ◽  
High Contrast ◽  
Contrast Imaging ◽  
X Ray ◽  
Forming Mechanism ◽  
Similar Image ◽  
High Contrast Imaging ◽  
Low Concentrations

A new microscope for the study of life science specimen has been developed. Special attention has been given to the problems of unstained samples, cryo-specimens and x-ray analysis at low concentrations.A new objective lens with a Cs of 6.2 mm and a focal length of 5.9 mm for high-contrast imaging has been developed. The contrast of a TWIN lens (f = 2.8 mm, Cs = 2 mm) and the BioTWTN are compared at the level of mean and SD of slow scan CCD images. Figure 1a shows 500 +/- 150 and Fig. 1b only 500 +/- 40 counts/pixel. The contrast-forming mechanism for amplitude contrast is dependent on the wavelength, the objective aperture and the focal length. For similar image conditions (same voltage, same objective aperture) the BioTWIN shows more than double the contrast of the TWIN lens. For phasecontrast specimens (like thin frozen-hydrated films) the contrast at Scherzer focus is approximately proportional to the √ Cs.

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