Progressive Multifocal Liquid Lenses Based on Asymmetric Freeform Surface Structure of Nonuniform Thickness Elastic Membranes with Different Constraints

Table 1

The relationship of liquid pressure and focal length of three kinds of liquid lenses.

Boundary conditions	Pressure (Pa)	Focal length (mm)/power
		Far view region	Near view region
Full edge constraint	150	310 (+3.22)	280 (+3.57)
	167	250 (+4.00)	220 (+4.54)
Two parts of edge constraint	120	300 (+3.33)	250 (+4.00)
	130	250 (+4.00)	200 (+5.00)
Three parts of edge constraint	104	250 (+4.00)	170 (+5.88)
	130	200 (+5.00)	150 (+6.67)