| HLs | Holographic lenses |
| HOE | Holographic optical elements |
| HL | Holographic lens |
| HSC | Holographic solar concentrator |
| PV | Photovoltaic |
| PVT | Hybrid photovoltaic/thermal technologies |
| CHP | Combined heat and power |
| HTF | Heat transfer fluid |
| DCG | Dichromated gelatin |
| AD | Ammonium dichromate |
| DOEs | Diffractive optical elements |
| N/A | Characteristics in the bibliography not found |
| DE | Diffraction efficiency |
| AA | Acceptance angle |
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