1. light beam at shallow angle

2. light beam at steep angle

3. Iris diffuser for adjusting light beam properties

4. An optical component for introducing optical aberrations to a light beam

5. Reference mark is set automatically by light beam from the photocell.

6. The invention relates to a device for deflecting a light beam.

7. A door closes on the light beam that's coming back to his eye.

8. See, there's a couple of ways to handle a light beam alarm system.

9. Apparatus for adjusting the direction of a light beam emitted by a laser tube

10. Each spot on the TLC plate is positioned in the centre of the light beam.

11. Method and apparatus for modulating an incident light beam for forming a two-dimensional image

12. A Biaxial crystal is an optical element which has two optic axes. When a light beam passes through a Biaxial crystal, the light beam splits into two fractions, being both fractions are extraordinary waves (two e-rays)

13. An ultraviolet light beam shines through the window, illuminating the precise cross-section of the object.

14. One kind of light beam translation quantity smallest Nicol prism form using mathematics method is presented.

15. Aperture, in optics, the maximum diameter of a light beam that can pass through an optical system

16. The light trap absorbs all the light when no test piece is inserted in the light beam.

17. An apparatus and method for modulating an incident light beam for forming a two-dimensional projection image.

18. The light trap absorbs all the light when no test piece is inserted in the light beam

19. Apparatus for stabilizing a laser beam includes an acoustooptic cell (12) which receives an input laser light beam and produces an undiffracted, or zero-order, light beam and a diffracted beam in response to an RF signal at a predetermined frequency.

20. When in an initial position, said optical afocal system has practically no influence on the light beam.

21. Acousto-optic modulator for selective extraction of one or more wavelengths from randomly polarized polychromatic light beam

22. The wavelength of the light beam is matched to the maximum absorption wavelength of the coloured film.

23. The light trap shall absorb all the light when no test piece is inserted in the light beam.

24. The light trap shall absorb all the light when no test piece is inserted in the light beam

25. The angle of the light beam of the dipped-beam headlamps shall be determined under the following load conditions:

26. The angle of the light beam from the dipped-beam headlamps shall be determined under the following loading conditions;

27. The angle of the light beam of the dipped-beam headlamps shall be determined under the following load conditions

28. The angle of the light beam from the dipped-beam headlamps must be determined under the following loading conditions:

29. The angle of the light beam from the dipped-beam headlamps shall be determined under the following loading conditions:

30. The microphone also picks up background acoustic waves caused by the laser light beam going trough the cavity wall.

31. The angle of the light beam from the dipped-beam headlamps must be determined under the following loading conditions

32. Because the Absorbance of a sample will be proportional to the number of absorbing molecules in the spectrometer light beam (e.g

33. The effect on the light beam is a rotation of its plane from the original one, otherwise known as optical rotation.

34. The electromagnet (44) has pole pieces (46, 48) with aligned passages (50, 52) through which the measuring light beam (18) passes.

35. The Collimator, with its long light beam as a "lever arm" is a very sensitive tool for detecting focuser problems

36. Aspherical lenses are lenses with complex curved surfaces, where the radius of curvature changes according to distance from the light beam axis

37. Using the phase, rather than amplitude, of a light beam to encode data can potentially offer exponential increase in the information carrying capacity.

38. A Birefringent wedge divides a light beam into two orthogonally polarized beams with polarization parallel to the optical axis by a larger angle

39. The searched gas component absorbs the first light beam and first acoustic waves are thus generated which are picked up by the microphone (110) .

40. The angle between the normal (perpendicular) to the surface of the test piece and the axis of the light beam shall not exceed 8°.

41. As long as the light beam does not pass any absorptive region, it eventually emits from the side of the mesa without significant attenuation.

42. The micro-elements act together to produce an output light beam having a desired cross-sectional area and spatial distribution of light intensity and angle.

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44. Light passing through a Colloidal dispersion, such as smoky or foggy air, will be reflected by the larger particles and the light beam will be visible

45. The resonant responses can be selected to reduce chromatic aberrations, or to shape a profile of a light beam, or to selectively switch a near field beam.

46. The aim is to eliminate the influence of any extraneous light falling on the light sensor and of any fluctuations in the intensity of the light beam.

47. Traditionally, commercial fibre-optic communications have relied on encoding the data in the amplitude of a light beam (varying the intensity of the light to transmit information).

48. Together, the plates of the dual compensator can then be rotated on the beam path through an angle β to compensate for asymmetrical aberrations in the light beam.

49. The invention relates to an optical system for processing a light beam, comprising first and second optical means (2, 4), converging and diverging respectively, which form an afocal optical device.

50. According to the angle of incidence of the light beam on the longitudinal axis (LA) of the Bragg grating (BG), various transmission characteristic lines having different gradients (m0 - m4) are obtained.

51. A polarimeter based on a modified Fizeau interferometer and a method for measuring the optical rotation of a polarized light beam by an optically active substance using the polarimeter, are provided.

52. In the light inlet aperture (7) there is an achromatic objective (9) secured by the sleeve (5) which can be moved along the optical axis (10) to focus the light beam (11).

53. Each beam deflecting element (28) allows a projection light beam (32) that is incident thereon to be deflected in accordance with a control signal which is applied to the beam deflecting element (28).

54. For the properly optimised resonant cell, the window background (a signal arisen in the cell due to absorption and reflection of light beam by the cell windows) is absent at any modulation regime.

55. The invention relates to a tracking device (10) for a light beam between a transmitter and a receiver with line of sight between them, which is provided with an optical tracking unit, which defines an optical axis (12), and an optical deflection element (16) arranged therein, which optical deflection element, for the purpose of altering the angle of elevation at which the light beam is incident or emerges, is tiltable about a tilting axis (28) running perpendicularly to the optical axis (12), and which optical deflection element, for the purpose of altering the azimuth angle at which the light beam is incident or emerges, is rotatable about a rotation axis (30) parallel to the optical axis (12).

56. A lens for a flashlight or other lighting unit provides for focusing light from a source, such as an LED, to provide a light beam adjustable between a spot beam and a wide beam.

57. The backscatter radiation effect was also analyzed applying a pair of 20 × 20 × 7.5 cm Cerrobend alloy blocks with 6.0 mm diameter pin-holes in the center aligned telescopically with the field defining light beam.

58. An ophtalmoscopic achromatizing lens unit (1) having planar outer surfaces (5, 6), and comprising a first, a second and a third lens element (2, 3, 4) arranged one behind the other, as seen in the path (15) of a light beam passing through the lens unit, wherein the first and third lens elements (2, 4) comprise one and the same first glass material, and the second, inner lens element (3) comprises a second glass material.

59. A robot controller in which a limiter that limits the operation ranges of the shafts of a robot mechanism (2) is constituted by a photo interruptor which is so constructed that a light beam passing through a light path (3c) provided in one moving portion of the robot mechanism (2) is interrupted by an interrupting plate (3d) mounted on the other moving portion when the interrupting plate (3d) has reached a predetermined position.