Laser projector

A laser projector comprising:

• a laser source that generates an input light beam for scanning and the input light beam being fed to a reflecting mirror of a deflection component for being scanned and formation of a scanning light beam;
• the deflection component that deflects the input light beam from the laser source to a first scanning direction and a second scanning direction;
• wherein the first scanning direction and the second scanning direction are mutually orthogonal and a scanning speed in the first scanning direction is faster than a scanning speed in the second scanning direction;
• a first prism having an incident surface and an exit surface that are both flat surfaces;
• wherein the scanning light beam from the deflection component is passed through the incident surface of the first prism and the first prism to be emitted out from the exit surface of the first prism;
• the incident surface of the first prism and the exit surface of the first prism are arranged in a non-parallel manner;
• a second prism having an incident surface and an exit surface that are both flat surfaces;
• wherein the incident surface and the exit surface are arranged not parallel to each other;
• the scanning light beam from the exit surface of the first prism is passed through the incident surface of the second prism and the second prism to be emitted out from the exit surface of the second prism;
• the scanning light beam performs two-dimensional scanning on an imaging surface to form an image on the imaging surface;
• the incident surface of the second prism and the exit surface of the second prism are arranged in a non-parallel manner;
• wherein an extended direction of an angle between the exit surface of the first prism and the incident surface of the first prism, and an extended direction of an angle between the exit surface of the second prism and the incident surface of the second prism are opposite to each other;
• the exit surface of the first prism, the incident surface of the first prism, the exit surface of the second prism and the incident surface of the second prism are all mutually arranged in a non-parallel manner;
• wherein the laser projector satisfies the following equations:
• θsh>θsc>θs1>0° or θsh<θsc<θs1<0°;
• wherein θsh is an angle between the scanning light beam and a surface normal of the imaging surface in the second scanning direction with a larger absolute value while a deflection angle θs2 of the deflection component in the second scanning direction is maximum;
• θsc is an angle between the scanning light beam and a surface normal of the imaging surface in the second scanning direction when the deflection component is at an initial;
• θs1 is an angle between the scanning light beam and a surface normal of the imaging surface in the second scanning direction with a smaller absolute value while the deflection angle θs2 of the deflection component in the second scanning direction is maximum;
• and
• θs2 is a deflection angle of the deflection component in the second scanning direction, when the deflection component is at an initial state with no deflection, the deflection angle θs2=0;
• wherein the laser projector further satisfies the following equations:
• 0.1<θmems/θin<0.4;
• 20°<θp1<37°;
• 7°<θp2<24°;
• θs1<16°;
• θs2<9°;
• and
• θsh>θsc>θs1>0° or θsh<θsc<θs1<0°;
• wherein θmems is an angle between a surface normal of the deflection component and a surface normal of the imaging surface formed in the second scanning direction when the deflection component is at the initial state;
• θin is an incident angle of the input light beam when the input light beam from the light source is incident into the deflection component and the deflection component is at the initial state;
• θp1 is an angle between the exit surface and the incident surface of the first prism;
• θp2 is an angle between the exit surface and the incident surface of the second prism;
• θs1 is an deflection angle of the deflection component in the first scanning direction.