Experiment on Applying a Color Image to Ordinary Glass With a Diode Laser (Endurance 4 Watt DPSS Laser Nd: YAG, 1064 Nm, F = 20mm).

A task:

Create a color image on the glass surface without using dyes. An idea from site (https://endurancelasers.com/engraving-on-a-glass-surface/) was taken as a basis. Next, I was interested in the possibility of obtaining a color image

1. Image

preparation:

The logo of the rock band AC / DC was taken as a basis. The logo was split into separate elements. Each element according to the results of the work should have its own color. It should be noted that for the correct drawing, the original image must be reflected horizontally.

The original image and each layer separately:

To prevent the image from shifting when changing metal plates, marks were applied to the glass. According to these marks, when the processed glass is displaced, it is placed in its original position.

2. A plate

made of a certain metal is placed on the laser desktop (the resulting color will depend on the type of metal) A glass plate is fixed on it (the glass thickness is 4 mm). An important point is setting the focus of the lens - the distance between the glass surface and the bottom of the emitter should be equal to 14.2 mm.

The glass is fixed to the metal plate with adhesive tape. The orientation of the plate relative to the laser along the X and Y axes is carried out using marks.

The first material used was titanium.

Processing was carried out in the following modes:

1. Speed - 850mm / min., Power 60%, interval 0.1mm, number of passes - 1.

The final layer color is gray.

2. Speed - 850mm / min., Power 90%, interval 0.1 mm, number of passes - 1. The final color of the layer is blue.

Then the titanium plate was replaced with a brass one.

On this material, processing was carried out in the following modes:

3. Speed - 500mm / min., Power 20%, interval 0.1mm, number of passes –1. The final layer color is brown.

4. Speed - 700mm / min., Power 15%, interval 0.1mm, number of passes - 1.

The final layer color is blue-gray.

5. Speed - 800mm / min., Power 30%, interval 0.1mm, number of passes - 1.

The final layer color is bronze (translucent).

6. Speed - 500mm / min., Power 70%, interval 0.1mm, number of passes - 1.

The final layer color is yellow.

7. Speed - 500mm / min., Power 15%, interval 0.1mm, number of passes - 1.

The final layer color is gray-green (semi-transparent).

8. Speed - 900mm / min., Power 90%, interval 0.1 mm, number of passes - 1. The final color of the layer is black.

As a result

of the work done, a clear color image was obtained on ordinary glass.