Monolithic beamsplitter array

An optical system for creating a plurality of equally spaced identical laser beams while maintaining pointing accuracy of the laser beams relative to each other with respect to both position and angle, the optical system comprising:

• a monolithic optical structure that includes:
• a mirror having a reflective surface configured to receive a laser beam in a first direction and reflect the laser beam in a second direction;
• and
• a beamsplitter array comprising:
• a first beamsplitter, having a first interface and a second interface, configured to receive the laser beam from the mirror at the first interface and direct the laser beam to the second interface, the second interface being configured to emit a first laser beam portion and redirect a second laser beam portion, via the first interface, to the mirror;
• and
• a second beamsplitter, having a first interface and a second interface, configured to receive, at its first interface, the first laser beam portion from the second interface of the first beamsplitter and the second laser beam portion from the mirror and direct the first laser beam portion and the second laser beam portion to its second interface, the second interface being configured to emit a first part of the first laser beam portion and a first part of the second laser beam portion and redirect a second part of the first laser beam portion and a second part of the second laser beam portion, via the first interface, to the mirror,
• wherein the mirror is configured to reflect the second part of the first laser beam portion and the second part of the second laser beam portion, and
• wherein the second interface of the first beamsplitter adjoins the first interface of the second beamsplitter.