the starting point of the optical path

The displayed graphic outline of distortion out of the anchor line, anchor get more closer to the original graph, but the greater the display file, a picture of the scan cycle increased. Anchor coordinates (x, y) by the D / A converter output, the console driver board through optical mirrors the direction of the control, respectively, mapped to the screen will anchor the body. As the galvanometer scan frequency of large graph can be done 25 frames / sec, therefore, the quality of the laser scan can be guaranteed. The principle of laser animation show animation in general is similar to an animation file from the component pieces of the action related pictures, taken in turn coordinates to locate the anchor scan. Optical scanning unit is a complete system to produce graphic effects of direct enforcement agency. Optical console optical system optical switch is driven by the motor mirror changes in the corner to complete. The approval of laser pointer  has been stated clearly.
Based on pre-arranged program, the microcontroller through the D / A card output switching signal to the splitting of the motor driver board, amplified to drive the motor rotation. To get the projection surface geometry, the key is turned to two of the motor speed and the combination to achieve the spatial dynamics of the laser beam combination. As the light of continuity, when the mirror rotates, the inevitable connection between two points in a line, so projected on the screen graphics, the graphics can be divided into a section of straight line segments, as long as the control of the mirror between the laser beam at each end in order quickly move on it. On the screen for an axis through the mirror of the optical analysis, X can be considered to mirror motor control motor control 1 and Y 2 respectively control the mirror projection graph of X and Y directions. The square, for example, as shown, taking the square of the center coordinates of the origin (that is, the starting point of the optical path), the square of the four vertices are A, B, C, D. The approval of laser pointer  should be done at first.
To be projected on the screen such as a square, two stepper motor rotation direction and order: the first projection on the screen point to the point E, that is, Y stepper motor is transferred to Step 3; and X to the motor is Step 3 to rotate (A point); Y motor reverse rotation to Step 6 (B point); X 6 steps to reverse rotation of the motor (C point); Y motor forward rotation to step 6 (D point); X to 3 steps forward motor rotation (E point).