Systems and methods for dual-wavelengths, two-photon printing to create high-resolution, multi-material 3d structures

A method for two photon printing using a quantity of photo-polymerizable material having a first material photo-polymerizable via an optical signal at a first wavelength or a second optical signal at a second wavelength, and a second material photo-polymerizable via the second optical signal at the second wavelength, the method comprising:

• generating a first optical beam at a first fixed wavelength, and a second optical beam at a second tunable wavelength;
• using a dichroic mirror to coaxially align the first and second optical beams;
• using a 4f lens system to direct the coaxially aligned first and second optical beams into an objective lens disposed elevationally apart, along a Z-axis, from the quantity of photo-polymerizable material containing the first and second materials, the objective lens focusing the coaxially aligned first and second optical beams to a focused image plane on or within the quantity of polymerizable material;
• using first and second galvanometer mirror subsystems to steer the coaxially aligned first and second optical beams within the image plane and using the coaxially aligned first and second optical beams to selectively photo-polymerize:
• the first material using the first wavelength;
• or
• the first and second materials simultaneously using the second wavelength.

A system for two photon printing using a quantity of photo-polymerizable material having a first material photo-polymerizable via an optical signal at a first wavelength or a second optical signal at a second wavelength, and a second material photo-polymerizable via the second optical signal at the second wavelength, the system comprising:

• a laser system to generate a first optical beam at a first fixed wavelength and a second optical beam at a second tunable wavelength;
• a mirror to coaxially align the first and second optical beams;
• a lens system;
• an objective lens disposed downstream of the lens system relative to a direction of travel of the coaxially aligned first and second optical beams;
• the lens system configured to direct the coaxially aligned first and second optical beams into the objective lens;
• the objective lens operative to focus the coaxially aligned first and second optical beams to a focused image plane on or within the quantity of polymerizable material;
• and
• a beam steering subsystem configured to steer the coaxially aligned first and second optical beams within the image plane and using the coaxially aligned first and second optical beams to selectively photo-polymerize:
• only the first material using the first optical beam operating at the first wavelength;
• or
• both the first and second materials simultaneously using second optical operating at the second wavelength.

A method for two photon printing using a quantity of photo-polymerizable material having a first material photo-polymerizable via an optical signal at a first wavelength, and a second material photo-polymerizable via an optical signal at a second wavelength, the method comprising:

• generating a first optical beam at a first wavelength;
• generating a second optical beam at a second wavelength different from the first wavelength;
• coaxially aligning the first and second optical beams;
• directing the coaxially aligned first and second optical beams into an objective lens disposed elevationally apart, along a Z-axis, from the quantity of photo-polymerizable material containing the first and second materials, the objective lens focusing the coaxially aligned optical beams to an image plane on or within the quantity of polymerizable material;
• steering the coaxially aligned optical beams within the image plane and using the first and second optical beams to photo-polymerize:
• only the first material using the first optical beam operating at the first wavelength;
• or
• at least the second material using the second optical beam operating at the second wavelength.