21. The viscoelastic properties of pitch make it the vehicle of choice for polishing high-quality optical lenses and mirrors. 22. Transmission electron microscopes use electron optical lenses are analogous to the glass lenses of an optical light microscope. 23. It features a 10X optical lens . 24. The twin optical lenses that pressed up against my eyes were reminiscent of childhood trips to the optician. 25. A, or B bombsight was issued together with the BZA-2 aperture ( a modernised optical lens system ). 26. Petzval's largest contributions to optics are his theoretical bases for the construction and correction of optical lens systems. 27. The company, which makes parts for television and computer monitors, as well as optical lenses , will keep its name. 28. Their concave fronts are as precisely ground as modern optical lenses , although their backs were left rough and uneven. 29. The principal difference between the lens of the eye and an ordinary optical lens is that the former is flexible. 30. With conventional optical lenses , the far field is a limit that is too distant for evanescent waves to arrive intact.
