TY - JOUR
T1 - Effects of curing, temperature, pressure, and moisture on the surface-figure of a high-precision bonded mirror
AU - Zhang, Xiumin
AU - Liu, Jianhua
AU - Xia, Huanxiong
AU - Ao, Xiaohui
AU - Zhou, Jiechen
AU - Fu, Zhihao
N1 - Publisher Copyright:
© 2023 Elsevier Inc.
PY - 2024/1
Y1 - 2024/1
N2 - Adhesive bonding is widely used in the assembly of high-precision optomechanical products. However, of the curing and relaxation behaviors as well as environmentally sensitive features of adhesives, the surface-figure accuracy of bonded mirrors is often attenuated, which greatly degrades the performances of the optomechanical system. This paper developed a comprehensive finite-element model for understanding the evolution of surface figure in a high-precision bonded mirror. For the used optical adhesive, its cure kinetics was experimentally examined by differential scanning calorimetry and then modeled based on a modified Kamal kinetic model, and its mechanical behaviors were described by a viscoelastic constitutive model including temperature, moisture, and degree of cure. Additionally, time-temperature/moisture/curing superposition principles for the adhesive were experimentally determined and embedded into the constitutive model. The comprehensive finite-element model was verified and then applied to simulate the surface-figure evolution of the bonded mirror. The effects of environmental factors, such as temperature, environmental pressure, and moisture, on the surface-figure accuracy and stability were further understood.
AB - Adhesive bonding is widely used in the assembly of high-precision optomechanical products. However, of the curing and relaxation behaviors as well as environmentally sensitive features of adhesives, the surface-figure accuracy of bonded mirrors is often attenuated, which greatly degrades the performances of the optomechanical system. This paper developed a comprehensive finite-element model for understanding the evolution of surface figure in a high-precision bonded mirror. For the used optical adhesive, its cure kinetics was experimentally examined by differential scanning calorimetry and then modeled based on a modified Kamal kinetic model, and its mechanical behaviors were described by a viscoelastic constitutive model including temperature, moisture, and degree of cure. Additionally, time-temperature/moisture/curing superposition principles for the adhesive were experimentally determined and embedded into the constitutive model. The comprehensive finite-element model was verified and then applied to simulate the surface-figure evolution of the bonded mirror. The effects of environmental factors, such as temperature, environmental pressure, and moisture, on the surface-figure accuracy and stability were further understood.
KW - Adhesive bonding
KW - Bonding stresses
KW - Curing-induced stresses
KW - Surface-figure
KW - Viscoelastic constitution
UR - http://www.scopus.com/inward/record.url?scp=85174744016&partnerID=8YFLogxK
U2 - 10.1016/j.precisioneng.2023.10.012
DO - 10.1016/j.precisioneng.2023.10.012
M3 - Article
AN - SCOPUS:85174744016
SN - 0141-6359
VL - 85
SP - 205
EP - 216
JO - Precision Engineering
JF - Precision Engineering
ER -