TY  - JOUR
AB  - Most of HEI’s custom and
standard optical switches require one lens to focus light from an LED and another to collect and
concentrate that light onto a photoelectric diode. Plastic lenses are typically glued into apertures in
polycarbonate housings using a two ‐part room temperature cured adhesive. To reduce cost
and increase productivity, lenses are fabricated in the apertures using an ultraviolet cured clear
adhesive. This process eliminates the cost of moulded plastic lenses and reduces cure time from 24
hours to less than a minute. One of the custom optical applications requires
bonding a coated glass cover over a cavity containing optical sensors and circuitry. Gas expansion
causes ‘blow‐outs’ when heat cured adhesives are used and room temperature
cured adhesives add a day to turnaround time. An ultraviolet cured adhesive increases productivity by
eliminating blow‐outs and reducing turnaround time. A unique process has been developed in
which the glass cover is placed over the cavity in a vacuum bell jar.
VL  - 14
IS  - 1
SN  - 1356-5362
DO  - 10.1108/13565369710800402
UR  - https://doi.org/10.1108/13565369710800402
AU  - Erickson M.
PY  - 1997
Y1  - 1997/01/01
TI  - Two Novel Applications of Adhesives for
Optical Microelectronics
T2  - Microelectronics International
PB  - MCB UP Ltd
SP  - 4
EP  - 5( continued on page 8)
Y2  - 2024/04/20
ER  -