in june 1997, digilens was founded by jonathan d. waldern with the mission to develop and market switchable bragg grating nano-composite materials for the optical telecommunication and wireless microdisplay markets. on 11 january 2000, the company demonstrated the dl40, a compact, lightweight monocular eyewear display with a see-through and rgb color capabilities based on holographic polymer-dispersed liquid crystals technology. later digilens changed its business model to focus its r&d on fibernet switching chips rather than hmds. in october 2003, digilens was acquired by sbg labs. nowadays sbg labs produces head-up displays based on their switchable waveguide technology for the united states army and the people's liberation army. it also develops the virtuality hmeyetrack, a binocular see-through eyewear display.