Accessory device for modulating the laser output of a pen-clip a

Details Accessory device for modulating the laser output of a pen-clip a Accessory device for modulating the laser output of a pen-clip a

1995-11-30

1997-09-02

Hellner, Mark

Optical: systems and elements

Optical modulator

362118, B43K 2410

Patent

active

056638280

ABSTRACT:
A laser beam experimentation kit, including an accessory device for modulating the intensity of the visible laser beam produced as output from a laser pointer. The accessory device comprises a printed circuit(PC) board of physically thin construction, which is adapted for slidable insertion between the conductive tip portion and the conductive housing portion of a pen-clip actuatable laser pointer. A pair of conductive pads are formed on the upper and lower surfaces of the PC board. An input signal jack is mounted on PC board for the purpose of receiving a mated plug connector that is connected to a flexible cable carrying an electrical input signal. An electronic circuit and a battery power source are also mounted on the upper surface of the PC board. The function of the electronic circuit is to respond to a predetermined signal characteristic (e.g., the amplitude, frequency or phase) of the input signal supplied to the input signal jack, and to provide a variable load between the pair of conductive pads formed on the PC board. In this way, when the PC board is slidably inserted between the conductive tip portion and the conductive housing portion of the pen-like housing of the laser pointer, the pair of conductive pads on the PC board automatically establish electrical contact therewith without problems of alignment or the like. During joint operation of the laser pointer and the accessory device, the impedance of the variable load varies in response to variations in the predetermined signal characteristic of the electrical input signal. Such variations in the impedance of the variable load automatically modify the flow of electrical current through the laser diode in the laser pointer and thus modulates the intensity of the laser beam in accordance therewith.

REFERENCES:
patent: 5319190 (1994-06-01), Allen et al.
patent: 5473464 (1995-12-01), Knowles et al.
Product Brochure for ML211 Laser Pointer by Metrologic Instruments, Inc., Feb. 1994.
NL211 Laser Pointer Instructions and Applications by Metrologic Instruments, Inc., Brochure No. MLPN 2191, Feb. 16, 1993 (Revision), pp. 1-4.
Product Brochure for Metrologic ML868 and ML869 Helium-Neon Lasers.

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