appendix 20, Prescriptions

from: Optical Design of Microscopes

Author(s): George H. Seward

Published: 19 April 2010

Chapter DOI: http://dx.doi.org/10.1117/3.855480.ap20

Chapter Page Count: 19 pages

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Front Matter

1. Optical Design Concepts

2. Basic Microscope Concepts

3. Basic Geometric Optics

4. Aberrations

5. Basic Physical Optics

6. Fluorescence

7. Optical Design Metrics

8. Image Contrast

9. Microlens Formats

10. Illumination Systems

11. Cover Strata

12. Objective Lenses

13. Tube Elements

14. Ocular Lenses

15. Sensors

16. Human Vision

17. Optical Materials

18. Composition and Spectra of Materials

19. Advanced Concepts

20. Prescriptions

Back Matter

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Excerpt

The prescriptions used in this book are summarized below.

The magnification M has several formats: spatial enlargement (10X), spatial enlargement with infinity correction (10XI), spatial reduction (10XR), or angular enlargement (10XA).

The focal lengths are important to macro- and microlens formats. A microscope objective is normally defined by magnification, numerical aperture, and tube length. The tube length (TL) may specify the focal length of the tube lens for enlargement with infinity correction.

The field of view (FOV) can be spatial (25 mm) or angular (15 deg). An attempt is made to make the field of view equivalent the 12-mm diameter of a typical CCD sensor.

The image convergence is specified by paraxial numerical aperture (NA), image-space numerical aperture (ISNA), object-space numerical aperture (OSNA), f-number (f/#), or image-space f/#, which indicates the f/# inflation.

Aspheric parameters indicate the following: conic indicates a conic constant; A4 indicates the scale of radius to 4^th power; A6 indicates the scale of radius to 6^th power.

http://dx.doi.org/10.1117/3.855480.ap20

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