List of optical & thermal measurement services
We are a full-service optical & thermal testing laboratory, with a broad scope in material optical & thermal property measurement, from standard services to advanced services and from laboratory testing to on-site testing/monitoring:
- Standard laboratory testing services
- Advanced laboratory testing services
- On-site testing services
- On-site monitoring services
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Standard laboratory testing services
Listed below are the standard testing services routinely performed by our laboratory:
| Service | Standard result set |
|---|---|
| Glass optical & thermal properties | ◦ Visible light transmittance/reflectance ◦ Solar energy transmittance/reflectance ◦ Solar heat gain coefficient (SHGC) and shading coefficient ◦ U-value |
| Fenestration thermal performance | ◦ Solar heat gain coefficient (SHGC) and shading coefficient ◦ U-value |
| Daylight reflectance | ◦ Total daylight reflectance ◦ Diffuse daylight reflectance ◦ Specular daylight reflectance |
| Solar reflectance index (SRI) | ◦ Solar reflectance/absorptance ◦ Thermal emittance ◦ Solar reflectance index (SRI) |
| Thermal conductivity | ◦ Thermal conductivity |
| Emissivity / emittance | ◦ Thermal emittance |
| Luminance contrast | ◦ Luminous reflectance ◦ Luminance contrast |
| Color & color difference | ◦ Color ◦ Color difference |
| Haze & luminous transmittance | ◦ Luminous transmittance ◦ Haze |
| Spectral transmittance / reflectance | ◦ Spectral transmittance/reflectance |
Advanced laboratory testing services
Advanced laboratory testing services are performed for special materials or applications. Listed below are the advanced laboratory testing services performed by our laboratory:
Glass optical & thermal properties related
| Service | Description |
|---|---|
| Thermochromic and electrochromic glasses | Optical and thermal properties of thermochromic and electrochromic glasses at various temperature levels and electrical states |
Daylight reflectance related
| Service | Description |
|---|---|
| Partially fritted glass daylight reflectance | Daylight reflectance testing of partially fritted glasses |
Solar reflectance index (SRI) related
| Service | Description |
|---|---|
| Transparent/translucent material SRI | Solar transmittance/reflectance/absorptance, thermal emittance, and SRI of transparent/translucent materials |
| Special solar spectra in solar reflectance testing | Non-standard solar spectra in solar reflectance testing for special applications |
Thermal conductivity related
| Service | Description |
|---|---|
| Paint and coating thermal conductivity | Thin material thermal conductivity testing with the transient hot-wire method |
| Soil thermal conductivity | A needle-type hot wire probe for soil material thermal conductivity testing |
| Agar gel thermal conductivity | Thermal conductivity testing of agar gel (or other gel-like materials) |
Color & color difference related
| Service | Description |
|---|---|
| Yellowness index and whiteness index | Material surface yellowness index and whiteness index testing |
| Dirt collection index | Architectural coating dirt collection index testing |
On-site testing services
Some optical & thermal properties can be tested on-site. Listed below are the on-site testing services performed by our laboratory:
| Service | Description |
|---|---|
| On-site testing of glass color uniformity | On-site measurement of glass color uniformity, with the following results: ◦ Colors (reference and samples) ◦ Color differences (between reference and samples) |
On-site monitoring services
For optical & thermal properties that cannot be tested on-site, it is possible to perform long-term performance monitoring to get equivalent or correlated results. Additionally, we can also perform weather monitoring or micro-climate monitoring on request. Listed below are the on-site monitoring services performed by our laboratory:
Optical & thermal performance moniotring
| Service | Description |
|---|---|
| On-site glass optical & thermal performance monitoring | On-site monitoring of the following quantities related to glass optical & thermal performance: ◦ Solar irradiance (outdoor and indoor) ◦ Daylight illuminance (outdoor and indoor) ◦ Air temperature (outdoor and indoor) ◦ Glass surface temperature |
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