Apparatus for diagonal progressive scanning video and method of improving aiming visibility, reducing tilt dependence and improving read range

A method for scanning a bar code having a height and a width, the method comprising:

• driving a mirror to oscillate about a first axis at a first frequency, f1;
• driving the mirror to oscillate about a second axis at a second frequency, f2, where f2=k*f1, and k is a rational number;
• reflecting a laser light from the oscillating minor, the reflected laser light having a wavelength and a thickness w;
• illuminating the width of the bar code with the light reflected from the moving mirror, wherein only a portion of the height of the bar code is illuminated;
• passing the laser light backscattered from the illuminated portion of the bar code through a filter centered on the wavelength of the laser light;
• receiving the filtered backscattered light at a portion of an array of pixels, wherein the array of pixels has an array width and each pixel has a respective pixel height, wherein the filtered backscattered light is received by only a portion of the respective pixel height of each pixel that receives the filtered backscattered light;
• and
• decoding the bar code.

A method for scanning a bar code having a height and a width, the method comprising:

• oscillating a mirror about a first axis at a first frequency, f1;
• oscillating the mirror about a second axis at a second frequency, f2;
• reflecting a laser light having a wavelength and a thickness w from the oscillating mirror;
• illuminating the width of the bar code and only a portion of the height of the bar code with the laser light reflected from the oscillating mirror;
• receiving laser light backscattered from the illuminated portion of the bar code at an array of pixels, wherein each pixel of the array of pixels has a respective pixel height, wherein the backscattered laser light is received by only a portion of the respective pixel height of each pixel that receives the backscattered laser light;
• and
• decoding the bar code.