| 11. | The sine of this maximum angle is the numerical aperture ( NA ) of the fiber.
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| 12. | State of the art objectives can have a numerical aperture of up to 0.95.
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| 13. | The resolution limit forumula used is 0.6 * wavelength / ( numerical aperture ).
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| 14. | In this method, multiple spatially modulated illumination patterns are used to double the effective numerical aperture.
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| 15. | Also termed immersion lithography, this enables the use of optics with numerical apertures exceeding 1.0.
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| 16. | This ratio is related to the image-space numerical aperture when the lens is focused at infinity.
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| 17. | Based on the diagram at the right, the image-space numerical aperture of the lens is:
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| 18. | Manufacturers have also introduced ever larger and more expensive lenses as a means of increasing the numerical aperture.
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| 19. | Beyond 7 nm, EUV would require a higher numerical aperture ( NA ) or else a shorter wavelength.
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| 20. | In conventional microscopes the limit is determined by the used wavelength and the numerical aperture of the optical system.
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