| 摘要 |
<p>A lens array and an optical module are provided in which appropriate attachment of a photovoltaic device taking into consideration deformation of a lens array main body as a result of temperature change can be performed. The invention satisfies a+b+d 1 +e+”L‰¤W 1 where,
a: positional accuracy of first lens faces 11
b: positional accuracy of second lens faces 12
d 1 : positional accuracy of light-emitting elements 7
e: positional accuracy of optical fibers 5
”L=±×”T×L (±: coefficient of linear expansion of lens array main body 4; ”T: temperature change in the lens array main body 4; and L: distance from a fixed position on a first surface 4a to a position of a lens face on the first surface 4a farthest from the fixed position)
W 1 : a distance between attachment positions before and after movement, under a premise that a photovoltaic device 3 is moved from an attachment position at which optical coupling efficiency between the light-emitting elements 7 and fiber ends 5a indicates a maximum efficiency to an attachment position at which efficiency reduction equivalent to 2dB is indicated.</p> |
