We　have　demonstrated　that　the　functions　of　focusing　and　collimation　of　the　transformer　lens　in　the　traditional　spectral　beam　combining　systems　can　be　achieved　by　two　optical　lenses.　One　lens　focuses　all　the　beams　from　all　emitters　on　the　grating,　which　makes　beams　superimposed　in　space,　while　the　other　lens　collimates　the　combining　beam　after　the　grating,　to　ensure　a　sufficient　amount　of　feedback　and　make　each　emitter　locked　at　different　wavelengths.　The　first　lens　used　for　focusing　doesn＇t　need　to　collimate　the　beams　from　all　emitters,　so　the　distance　between　the　focusing　lens　and　the　front　face　of　diode　laser　bar　is　no　longer　the　focal　length　of　the　transformer　lens　and　can　be　very　short.　So　the　optical　path　of　the　system　is　reduced　by　half　approximately,　which　makes　it　convenient　for　spectral　beam　combining　of　multiple　bars.　A　standard　semiconductor　laser　array　is　employed　in　this　experiment.　Output　power　of　49.42　W　and　electro-optic　conversion　efficiency　of　42.7%　are　achieved.　The　spectral　line-width　is　8.5　nm.　Mx2　values　of　1.29　and　11.6　in　horizontal　and　vertical　directions　are　obtained.　The　beam　quality　of　the　output　is　close　to　that　of　a　single　emitter　of　the　array　in　both　directions.　©,　2015,　Board　of　Optronics　Lasers.　All　right　reserved.