/Length 10 0 R They’ll help you find the perfect window, that will maximize your in-home comfort. endobj (2) The furnace output should be large. In the process of making glass, it is inevitable to add some artificial chemical materials, such as boric acid, sodium and antimony oxide. �s�67��� ���o0=?y�]#�r����O~X�������S�r1�7���OЊ��U[�|���_66�Q�f����%V��U)�-�Br*���m������������'�Ҩ�8k��*p{ߎ��l���8�L�[��E �_}��"���n���խ��}R�[\ez�9f;�n~�����Ԟ�6�������å�Z]J��� �Sʵ{s�Z�x�_U}���~��_Ċ���+����Д�Mܽ���/��\[���̕�n�1:�����Ͼ@��x�V���- High-performance windows with low-E coatings can reject the solar heat gain while allowing relatively high amounts of visible light to pass through the glass, however, the more solar gain being filtered out, the less (minimal) the transmittance. In the decoration industry, glass must be one of the most common materials. The higher the number, the greater the amount of light that is passing through the glass. Glass with low refractive index has high transmittance. For optical glass, they provide the excellent transmittance (visible wave) range about 400-800 nm. In the case of no significant difference in glass composition, the factors that affect the light transmittance of the glass are mainly the following reasons: the quality of the raw materials, the fuel and refractory materials, the amount of furnaces and the broken glass that is returned to the furnace. If you would like to know more, give us a call or send us a request for more information. The measurement accuracy over the complete spectrum is … d o c) /Producer (Amyuni Document Converter) /Version (Version 2.50a - Licensed to SCHOTT AG) /CreationDate (D:20070806112144) >> endobj 7 0 obj << /Length 8 0 R /Filter /FlateDecode >> stream Stick to purer raw materials. Solar transmittance, also referred to as light transmittance or visible transmittance, is the measurement of visible light passing through a piece of glass. hK��\[���z�9П�|�{��Y]�⎕2 ��z����0T) Solar transmittance can be altered by the addition of glass coatings, etchings, solar films, and more. (4) Improve the surface finish of glass products, improve the convex mold of the oscilloscope glass screen, improve the quality of the inner surface of the glass screen and reduce various defects that affect the light transmittance of the glass screen. Factors affecting glass transmittance. 1. The nature of glass is still some of the minerals in nature; such as quartz sand, feldspar powder, dolomite powder, calcite, etc., It is mostly a natural mineral, it will inevitably occur under the accumulation of natural long time. (3) Periodically scrape the material on the work leak surface to remove the colored glass on the liquid surface and affecting the light transmittance of the lower glass. x^3T0 BCC3= #9������R��,aj�g�`lf�gh�`l"�s��=s-\� \V�endstream This article will detail how to improve glass light transmittance and the light transmission meter. (1) Pay attention to batch quality. stream How to Measure Ultraviolet Radiation Intensity by a UV Lamp Intensity Meter? %PDF-1.3 %���� 1 0 obj << /Title (�� T I E - 3 5 T r a n s m i t t a n c e . ����9B�X���~ݮ^�a���ʊ����q�D�Ͼ�ɷ���L���Y����Q@��;;�1�F�h�U���k�(��j�������^����NrP`�8��76��?�SQÊz�N\�a�DH��-%K�ұ�`Τ���e,���~�׻�7�R��P���K $?�?�t�c���O�;�s�ᣏ��-��!����Ll��{βa�O(w��%)S�s��E��ku�ɨsh��n T'�蛄p���r�� �a� 8 0 obj #�����e��y8�r�FR ��ŧ؃|�ɟ9�e�2�Cl7��*�/.��/ �Z�J#�i6wS�z}�3+�[�)��^�d�Y �m5m�HqNO�<߱�ۛ�!�ԥ;�7�:���&N��U�0��$�[lk��!I�PU��޶Ђ�>´��N�(h��z��7�dq7��%�p>�@�zfݑ�b���~�n�׽��y�vcC6�ViJr��!Խ}l�g��]�õ$�)i%[�����<9���%蟲��2�^���@Qk��P:��ˋ�0 �'�6M٫��(����:��|wm lc���@G!�5"�Mr4��^�)C7D1�#�ƣ�Z�/3;�pv�c[������.L�T��W�N;!d�E����I��v3d(P('O��S�5�H �0�Ň)b�2sw_�����F�@h]�ט jo�d�k�p��y,�*��� �c�u�]yF��i����I����H�U�S(%tH�*$�5y�'�F>���c8�f��� �z�B�x!|f��R�w>v��f��υ�d�t��a��=�i��͘��|�^go�h�&��#7���ؙ��$�������?��3Fv��#�5e(&$�iy"�k��^B�=� 3M���q����Qu�i����ZA!#^�DcO$��̷c_:������'�P��Ȏ�� �����y,8�X/��3ci��ړ9$ &�q��2i gg�"�-�(�#ϙTS6c�w���-���:e�Έ9�k}ȣ�x�ā0O1)������t�L��;�F�d�+-j�"��ռ�+ד�A�l��GV/G�~�*F����w z)�,-.��kw��..�=& /Width 333 /Height 108 /BitsPerComponent 8 /ColorSpace /DeviceRGB /DecodeParms [<>] /Filter [/FlateDecode] Transmission of visible light determines the effectiveness of a type of glass in providing daylight and a clear view through the window. Glass has been spread in all areas of society. Glass is a transparent material. endobj Although maximizing the amount of light entering through a window is often desired, especially in colder climates, there is often an undesirable solar heat gain. Blog > Category Post > Posted: 2017-Dec-19, Updated: 2020-Sep-22. �=^V[t�Wg�ם��cɵ-��D$��[���q��?�˳��H�ʕܸ�oO��/y����5R�+ρ���cPO�u����f�J9�=�d���]F6�4��l���nY�o��̟����=K���(� �U"���I�9�΃%r�Jv�Ħ �9�@'�@����7�HBv�j���g�9�k����� Of course you have several types of glass. Need help finding understanding visual transmittance, leave the guessing out of it, talk to your local window specialist. << The transmittance of optical glass is measured using double beam spectral photometers from the company Perkin Elmer with special modifications. ��F`�R��tn�x������H/����c�e�tㆿ����7��ʙ+����C�oݐq;�5?����^^�u���ʳ�nڰ��绶��:s�{���}��kw��� The standard setup enables to measure within a wavelength region from 250nm up to 2500 nm. /Type /XObject It is measured as a percentage where 100% would be completely clear and transmit all the light, while 50% would only let half the light through. These materials have a much higher purity than natural minerals and have a small impact on the light transmittance of glass. (5) Use the light transmission meter to strengthen the detection of glass transmittance and have a better grasp of glass transmittance in time. Visible transmittance (VT - expressed as a number from 0 to 1) also known as Visible light transmission (VLT - expressed as a percentage %) is a measurement of the amount of light in the visible portion of the spectrum that passes through glass. Some magazines that are difficult to remove manually, during the glass refining process, the presence of some glass will not affect the quality of the glass. VT is the typical measurement used for windows. How to Measure UV Light Intensity of Germicidal Lamps? /Name /Im9 When the heavy oil is not completely burned, some impurities in the air will enter the glass, which affects the light transmittance of the glass. Arrange more productions to make the molten glass stay in the furnace as short as possible.