Verification of a Small-Form-Factor Optical Head With Micro Holographic Optical Element

Prism-type holographic optical element design and verification for the blue-light small-form-factor optical pickup head

“…Figure 13 is the assembled module that integrated all components except the objective lens. Based on previous reports [20][21][22][23], we believe that the module will generate servo signals if an objective lens is put on.…”

“…Based on the design configuration, there have been a series of studies presented to fulfill and strengthen its feasibility, such as the micro blue-light objective lens with the numerical aperture (NA) of 0.65 [12], the dual-stage seesaw-swivel actuator [13][14][15][16], the astigmatic reflector [17], and the fabrication using microelectromechanical systems (MEMS) technologies [18,19]. The servo characteristics of the design have been successfully verified by Hou et al [20][21][22] for the red-light system and by Lin et al [23] for the blue-light system, respectively.…”