Abstract

The resolution of a microscope depends critically on the size of the aperture of its objective lens. Achieving a wide aperture, and thereby high resolution, requires that the lens be large and close to the specimen, and further it is necessary to fill the space between the specimen and the lens with a material whose refractive index matches that of the lens to prevent light loss at steep angles from reflection (oil immersion). We are attempting to apply the concept of scanned aperture radar (SAR) to eliminate both the need for a lens close to the specimen and for oil immersion of the specimen. If successful, the result will be a general-purpose, lensless microscope with a resolving power double the theoretical limit for a microscope with a lens and with an arbitrarily long working distance. The microscope operates by collecting the phase and amplitude of scattered light from the specimen sequentially, hence """"""""scanned aperture"""""""" and the image is reconstructed from selected Fourier components after all the data have been collected using a high-speed optical processor developed by the Essex Corporation for SAR work.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR002483-10
Application #
5224052
Study Section
Project Start
Project End
Budget Start
Budget End
Support Year
10
Fiscal Year
1996
Total Cost
Indirect Cost

  Publications

Deng, Manqi; Williams, Carmen J; Schultz, Richard M (2005) Role of MAP kinase and myosin light chain kinase in chromosome-induced development of mouse egg polarity. Dev Biol 278:358-66
Tutuncu, Levent; Stein, Paula; Ord, Teri S et al. (2004) Calreticulin on the mouse egg surface mediates transmembrane signaling linked to cell cycle resumption. Dev Biol 270:246-60
Brown, Rebecca L; August, Shelley L; Williams, Carmen J et al. (2003) AKAP7gamma is a nuclear RI-binding AKAP. Biochem Biophys Res Commun 306:394-401
Deng, Manqi; Kishikawa, Hidefumi; Yanagimachi, Ryuzo et al. (2003) Chromatin-mediated cortical granule redistribution is responsible for the formation of the cortical granule-free domain in mouse eggs. Dev Biol 257:166-76
Brown, Rebecca L; Ord, Teri; Moss, Stuart B et al. (2002) A-kinase anchor proteins as potential regulators of protein kinase A function in oocytes. Biol Reprod 67:981-7
Li, J; Zhu, X; Ashton, F T et al. (2001) Sensory neuroanatomy of a passively ingested nematode parasite, Haemonchus contortus: amphidial neurons of the third-stage larva. J Parasitol 87:65-72
Robson, P; Stein, P; Zhou, B et al. (2001) Inner cell mass-specific expression of a cell adhesion molecule (PECAM-1/CD31) in the mouse blastocyst. Dev Biol 234:317-29
Travis, A J; Merdiushev, T; Vargas, L A et al. (2001) Expression and localization of caveolin-1, and the presence of membrane rafts, in mouse and Guinea pig spermatozoa. Dev Biol 240:599-610
Stein, P; Schultz, R M (2000) Initiation of a chromatin-based transcriptionally repressive state in the preimplantation mouse embryo: lack of a primary role for expression of somatic histone H1. Mol Reprod Dev 55:241-8
Li, J; Ashton, F T; Gamble, H R et al. (2000) Sensory neuroanatomy of a passively ingested nematode parasite, Haemonchus contortus: amphidial neurons of the first stage larva. J Comp Neurol 417:299-314

Showing the most recent 10 out of 38 publications