CARBON-FIBRE-REINFORCED POLYMER PARTS EFFECT ON SPACECRAFT OPTOELECTRONIC MODULE LENS SCATTERING

Spacecraft optoelectronic modules traditionally have aluminum alloy or titanium alloy casing which substantial weight increases fuel consumption required to put them into orbit and, consequently, total cost of the project. Carbon fiber reinforced polymer based composite constructive materials is an efficient solution that allows reducing weight and dimensions of large optoelectronic modules 1,5–3 times and the coefficient of linear thermal expansion 15–20 times if compared with metals. Optical characteristic is a crucial feature of carbon-fibre-reinforced polymer that determines composite material interaction with electromagnetic emission within the optical range. This work was intended to develop a method to evaluate Carbon fiber reinforced polymer optoelectronic modules casing effect on lens scattering by computer simulation with Zemax application software package. Degrees of scattered, reflected and absorbed radiant flux effect on imaging quality are described here. The work included experimental study in order to determine bidirectional reflectance distribution function by goniometric method for LUP-0.1 carbon fabric check test pieces of EDT-69U epoxy binder with EPOFLEX-0.4 glue layer and 5056-3.5-23-A aluminium honeycomb filler. The scattered emission was registered within a hemisphere above the check test piece surface. Optical detection direction was determined with zenith (0º < θ < 90º) and azimuth (0º < φ < 180º) angles with 10° increment. The check test piece surface was proved to scatter emission within a narrow angle range (approximately 20°) with clear directivity. Carbon fiber reinforced polymers was found to feature integrated reflectance coefficient 3 to 4 times greater than special coatings do. 

1. I.L. Akkuratov, A.I. Alyamovskiy, D.Ya. Davyidov. Konstruktivno-tekhnologicheskiye resheniya sozdaniya korpusnykh elementov iz kompozitsionnykh materialov bloka optiko-elektronnogo modulia avtomaticheskogo kosmicheskogo apparata [Structurally-technological solutions create a housing elements made of composite materials automatic spacecraft optoelectronic module unit]. Dnepropetrovsk, Ukraine, 2013, pp. 28–33 (in Russian).

2. Anurev V.I. Spravochnik konstruktora-mashinostroitelia [Mechanical engineer’s handbook]: in 3 vol. Vol. 1, 8-th ed., Мoscow, Mechanical engineering Publ., 2001, 920 p. (in Russian).

3. Bobovich B.B. Nemetallicheskiye konstruktsionnye materialy [Nonmetalic structural materials]. Moscow, Moscow State Industrial University Publ., 2009, 383 p. (in Russian).

4. Spectrecology – Spectroscopy & Optical Sensing Solutions. Sampling Optics Define the Measurement. Salmonberry St. Wesley Chapel [Electronic resource]. – Mode of access: http://www.spectrecology.com/sampling-optics/. – Data of access: 05.11.2015.

5. Nicodemus F.E., Richmond J.C., Hsia J.J., Ginsberg I.W., Limperis T. Geometrical Considerations and nomenclature for reflectance. Radiometry, Jones and Bartlett Publishers, Inc., USA, 1992, pp. 94–145.

6. Sing Choong Foo. A Gonioreflectometer for measuring the bidirectional reflectance of material for use in illumination computation: a thesis for the degree of master of science: august 1997, New York, 1997, 130 p.

7. Kreopalova G.V., Lazareva N.L., Puryaeva D.T. Opticheskiye izmereniya [Optical measurements], Мoscow, Mechanical engineering Publ., 1987, 264 p. (in Russian).

8. Mark Nicholson. How to Compile a User-Defined Surface [Electronic resource]. Zemax Knowledge Base., 2008, mode of access: http://www.zemax.com/support/ knowledge base/how-to-compile-a-user-defined-surface, data of access: 05.11.2015.

9. Zhang W.J., Zhao J.M., Liu L.H.. Experimental study of the effective BRDF of a copper foam sheet. RAD13. Proceedings of the 7th International Symposium on Radiative Transfer, Begellhouse. 7-th International Symposium on Radiative Transfer, 2-8 Jun. 2013, Kusadasi, Turkey