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6 3 40 4 Figure 4 is a diagrammatic illustration of myimproved flashlight using a concentrating reflector bulb and a short focallength lens with the lens in the advanced position; 3 2 11spring bracket 7doubleconvex lens 12 3 2 4 44 6 18 However, with some LEDs, use of a reflector, in combination with a lens,may be advantageous. If the LED used has a large directivity angle, forexample, 60, 70, 80, 90 degrees, or greater, the lamp housing 42 can also actas a reflector. LED 60,70,80,90 LED LED 90 LED 2 LED LED+ LED 23 3 2 3 2
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2 0000000 93 9 3095 6 9 3 0000000 1923 12 18 2 LEDA flashlight has a lens moveable relative to an LEDTwisting the front housing sectionalso adjusts the focus of the beam 2 "ABSTRACT" 1 3 the cap is adapted to change the distance of the lens from a source oflight constructed to throw the rays in a certain direction in order to focusthe light effectively at different distances 3 105175 2 2 1 LED LED 3 2 3 1
8(2) 2 2 1 LED LED 2 LED LED "Other more powerful LED will soonbe available, which may affect lens selection." 2 column5 13 2 3 LED 2 3 2
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A light beam provided by the flashlight 10 has minimal dark spots. Inaddition, the spot pattern produced by the flashlight 10 is nearly a perfectcircle, throughout the entire range of focus. 2 3
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