One embodiment of the present invention relates to a combined mixer filter circuit. The analyte molecules are disposed near a metallic film that is positioned between a first medium on a first side and a second medium on a second side, the second medium being of higher refractive index than the first medium. Other components can include thermally preformed textured proteinaceous gel phase components to mimic particles of meat protein. Additionally, or alternatively, preferred implementations can include the movable support, when extended into the mold cavity, guiding and ensuring proper alignment of a free end of the pin for capture within a recess defined by at least one portion of the mold. When zooming from the wide-angle end to the telephoto end, imaging magnifications of the first refractive power variable element and the second refractive power variable element are increased. This structure can suppress heat dissipation to the exterior of the image heating apparatus, thus suppressing the energy consumption.