Optical Instrument

A. The night vision sight NP-75 is designed for aimed hunting gun firing in the twilight and at night. Intensification of luminous flux from the observed scene is taken place by an electrooptical transducer. Luminous laying mark in the field of view of the sight is use for a target aiming. Smooth adjustment of the mark’s brightness allows aiming on targets with different illumination.

Generation: I

Magnification, times: 2

Field of view, degrees: 12

Range of target detection, m: 400

Dimensions, mm: 256х72х76

Mass, kg: 0.95

B. ON 1х20 night vision goggles is an optronic device, intended for visual observation of objects in dark time of the day, to orient oneself in a given area, or on water surface in conditions of natural night illumination.

The device is provided with refocusing of the objectives to observe both remote and nearby objects.

Generation: I

Magnification, times: 1

Field of view, degrees: 40

Caution: While test-operating the goggles in the day time or under condition of artificial illumination, NEVER remove protective cover from the objective lens!  

Interpuppilary distance, mm: from 59 to 70

Dimensions, mm: 180х120х170

Mass, kg: 1

Caution: While test-operating the binocular in the day time or under condition of artificial illumination, NEVER remove protective cover from the objective lens!  

C. BAIGISH-6U is an excellent example of how elaborations of the night vision equipment designed for the military take stable positions now on a consumer market. If you are looking for real 2-nd generation night vision binocular with resolution not less than 30 lines/mm this is BAIGISH-6U. Its perfect binocular eyepiece lets easily keep observation at any distance. It's very important that BAIGISH-6U has a weather proof metal body. Unlike other night vision devices, especially equipped with a plastic body, BAIGISH-6U does not look like a toy at all. Really, this device is for a serious user.

Generation: II

Magnification, times: 2.4

Field of view, degrees: 8

Dimensions, mm: 405х168х85

Mass, kg; 1.8

D. The night glasses "Baigish- 9M2" are designed for observation of animate nature and terrain at an ambient skylight or faint artificial intensity. The visibility range depends on the ambient light intensity, nature of objects being observed, contrast between the object and background and transparency of atmosphere.

Generation: I

Magnification, times: 2.2

Caution: While test-operating the goggles in the day time or under condition of artificial illumination, NEVER remove protective cover from the objective lens!  

Field of view, degrees: 14

Dimensions, mm: 165х125х80

Mass, kg: 0.87

Exercise 1. Answer the following questions.

1. Where can these optical instruments be used?

2. Are these devices cheap or expensive?

3. What information, you think, is the most important?

4. Would you like to buy one of them and for what purpose?

TASK 4

Дата добавления: 2015-10-29